WO2009145172A1 - フローセル及び送液方法 - Google Patents
フローセル及び送液方法 Download PDFInfo
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- WO2009145172A1 WO2009145172A1 PCT/JP2009/059577 JP2009059577W WO2009145172A1 WO 2009145172 A1 WO2009145172 A1 WO 2009145172A1 JP 2009059577 W JP2009059577 W JP 2009059577W WO 2009145172 A1 WO2009145172 A1 WO 2009145172A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/05—Flow-through cuvettes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
- B01L3/50273—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by the means or forces applied to move the fluids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N21/552—Attenuated total reflection
- G01N21/553—Attenuated total reflection and using surface plasmons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/06—Fluid handling related problems
- B01L2200/0621—Control of the sequence of chambers filled or emptied
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/14—Process control and prevention of errors
- B01L2200/148—Specific details about calibrations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/16—Reagents, handling or storing thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/0809—Geometry, shape and general structure rectangular shaped
- B01L2300/0829—Multi-well plates; Microtitration plates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/0861—Configuration of multiple channels and/or chambers in a single devices
- B01L2300/0864—Configuration of multiple channels and/or chambers in a single devices comprising only one inlet and multiple receiving wells, e.g. for separation, splitting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/04—Moving fluids with specific forces or mechanical means
- B01L2400/0403—Moving fluids with specific forces or mechanical means specific forces
- B01L2400/0406—Moving fluids with specific forces or mechanical means specific forces capillary forces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/06—Valves, specific forms thereof
- B01L2400/0694—Valves, specific forms thereof vents used to stop and induce flow, backpressure valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5025—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures for parallel transport of multiple samples
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
- B01L3/502715—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by interfacing components, e.g. fluidic, electrical, optical or mechanical interfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
- B01L3/502723—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by venting arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N2021/0346—Capillary cells; Microcells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N2035/1027—General features of the devices
- G01N2035/1034—Transferring microquantities of liquid
- G01N2035/1039—Micropipettes, e.g. microcapillary tubes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T436/00—Chemistry: analytical and immunological testing
- Y10T436/25—Chemistry: analytical and immunological testing including sample preparation
Definitions
- the present invention relates to a flow cell and a liquid feeding method.
- This application claims priority based on Japanese Patent Application No. 2008-141463 filed in Japan on May 29, 2008 and Japanese Patent Application No. 2008-141464 filed on May 29, 2008 in Japan. And the contents thereof are incorporated herein.
- Measurements using advanced biomolecular identification functions such as antigen-antibody reactions and DNA fragments (DNA probes) and DNA binding are important technologies for clinical tests, biochemical measurements, and environmental pollutant measurements. It has become. Examples of this measurement include micro TAS (Total Analysis Systems), micro combinatorial chemistry, chemical IC, chemical sensor, biosensor, trace analysis, electrochemical analysis, QCM measurement, SPR measurement, and ATR measurement. In such a measurement field, the sample solution to be measured is often in a very small amount.
- a sample cell capable of holding a sample solution is used (for example, see Patent Document 1). Then, a very small amount of the sample solution is supplied to the sample cell, and the sample solution is flowed to and transferred to the detection unit for measuring the sample cell. Thereby, the measurement is performed with higher sensitivity and higher efficiency without reducing the concentration of the sample (DNA, antibody, etc.) dissolved or dispersed in the sample solution.
- a sample cell that allows the sample solution to flow through the measurement portion in this way is called a flow cell.
- Non-Patent Document 1 a technique has been proposed in which a flow cell or a region serving as a pump capable of expressing capillary action is formed in a flow cell (see Non-Patent Document 1).
- the flow cell produced by this technique is provided between an inlet (feeding unit) through which a sample solution is introduced, a capillary pump (transfer unit) for sucking the introduced sample solution, and between the inlet and the capillary pump.
- the measured flow paths are formed in a straight line along the planar direction of the plate-like cells.
- the measurement result of the sample solution to be measured is compared with the measurement result of the reference solution having properties similar to the sample solution, and the difference in the sample results in the sample solution. Measure.
- a reference solution is first flowed through the flow path of the flow cell, and a first measurement of the reference solution is performed to obtain a result.
- the sample solution is poured and measurement is performed to obtain the result.
- the measurement result of the sample solution is obtained using the first and second measurement results of the reference solution.
- the operator waits for the reference solution to be sucked into the transfer unit and transferred from the supply unit, and then supplies the sample solution. There is a need. Similarly, it is necessary to continue supplying the second reference solution after the sample solution has been transferred. That is, when sequentially supplying different solutions to the supply unit, the timing and liquid supply timing are set so that the solutions do not mix as much as possible and no gap is formed between the different solutions flowing in the flow path. It is necessary to pay attention to the amount of liquid.
- a plurality of measuring devices are used for measurement using such a flow cell, and the measurements are performed in parallel. For this reason, when one worker operates a plurality of measuring devices, the burden on the worker is large.
- the measurement result of the sample solution to be measured is compared with the measurement result of the reference solution having a property similar to the sample solution, and the specimen in the sample solution is determined by the difference. Is being measured.
- the measurement is performed in a flow cell, it is necessary to provide a sample solution system and a reference solution system on the same cell.
- the structure of the flow cell becomes complicated. For this reason, generally, a reference solution is first flowed through the flow path of the flow cell to measure the reference solution to obtain a result, and then a sample solution is flowed to perform measurement to obtain a result. The measurement results are compared.
- a plurality of syringe pumps are used. Specifically, each of these syringe pumps is connected to the liquid switch inlet side with a tube or the like, the liquid switch outlet side is connected to the flow cell, and the liquid switch is switched for each solution to be supplied to the flow cell. Has been done.
- the operator supplies the reference solution and the sample solution to the flow cell using a pipette or the like, the operator supplies the reference solution to the supply unit, and then the reference solution is sucked into the transfer unit and supplied to the supply unit. Therefore, it is necessary to continue supplying the sample solution when the transfer is completed. That is, when sequentially supplying different solutions to the supply unit, it is necessary to work so that the solutions do not mix as much as possible and that no gap is formed between the different solutions flowing through the flow path. .
- the reference solution is stored and stored in the flow cell in advance and measurement is performed using the flow cell, the reference solution is measured first, and then the sample solution is supplied to the flow cell.
- a method of measuring the above is also conceivable.
- the detection unit facing the flow channel is exposed to the reference solution for a long period of time, the detection unit deteriorates and affects measurement accuracy.
- the present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a flow cell and a liquid feeding method capable of adjusting the timing of feeding a sample solution and the amount of liquid feeding according to work.
- Another object of the present invention is to provide a flow cell and a liquid feeding method capable of improving workability with a simple configuration and ensuring measurement accuracy.
- a flow cell includes a flow path through which a sample solution flows, a supply unit that is connected to the flow path and to which the sample solution is supplied, one end side that is in communication with the flow path, and the other end side that is outside air.
- a plurality of openings that are open to each other, a transfer section that communicates with the flow path and sucks the sample solution supplied to the supply section and leads to the flow path, and faces the sample solution in the flow path
- a detection part and the sealing member which seals at least any one of the said opening part or the said supply part so that opening is possible are provided.
- the opening on the other end side of the transfer part that sucks the sample solution and guides it to the flow path is sealed by the sealing member, so that the supply is continued until the sealing member opens the opening.
- the sample solution supplied to the section does not flow into the flow path.
- the some opening part is provided and the quantity of liquid feeding can be determined according to the range which opens these opening parts. That is, the sample solution is transferred only to the portion of the transfer portion corresponding to the opened opening, and the liquid supply is stopped when the sample solution is filled in the portion of the transfer portion. Therefore, the operator can freely adjust the timing and amount of the sample solution supplied to the supply unit in accordance with the operation.
- the operator when it is desired to flow a solution such as a reference solution different from the sample solution into the flow path before or after supplying the sample solution, the operator actively determines the timing and amount of each solution to be fed. Since it is determined, the following problems as in the prior art do not occur. That is, the operator performs the work passively while paying attention to the amount of decrease in the solution remaining in the supply unit, and the next solution in an empty state after all of the previously supplied solution has been transferred from the supply unit.
- the sealing member may be attached to at least one of the opening or the supply unit and be peelable.
- the sealing member is made of, for example, an adhesive tape, and the adhesive tape can be peeled off to easily open the opening, the workability is good and the opening range is accurately set. be able to.
- the sealing member may have a rod shape that closes the opening with a base end, and the tip may be tilted to open the opening.
- the sealing member is formed of a rod-like material such as a resin material, and its base end is in a state of being sealed by closing the opening. And if the front-end
- the transfer unit may include a plurality of through holes.
- the transfer unit is arranged with a plurality of chambers having one end communicating with the flow path and the other end serving as the opening, and a gap between the chambers.
- a plurality of columnar members may be provided.
- the interval between the plurality of columnar members inside the chamber is configured to develop a capillary phenomenon, and the sample solution is sucked up from the flow path, so that the same effect as the above-described flow cell is achieved.
- the transfer solution that has properties similar to the sample solution and is used for measurement comparison is stored in the supply unit and can be opened, and the transfer The unit includes a first transfer unit that communicates with the other end side of the flow path, sucks the reference solution stored in the supply section, and guides the reference solution to the flow path, and stores the reference by opening the storage section. You may send a solution to the said detection part of the said flow path.
- the storage unit for storing the reference solution in the supply unit since the storage unit for storing the reference solution in the supply unit is provided, it is not necessary for the operator to supply the reference solution from the outside to the flow cell at the time of measurement.
- the stored reference solution can be sent to the detection part of the flow path only by a simple operation of opening the container. Therefore, since it is only necessary to supply the sample solution to the flow cell at the time of measurement, the reference solution and the sample solution are respectively supplied to the flow cell using a plurality of syringe pumps, liquid switches, tubes, and the like as in the past. Complex equipment configuration is not required and equipment costs can be reduced. Moreover, there is no troublesome trouble of exchanging these syringe pumps, liquid switches, tubes, etc. for each measurement, washing and drying, and the workability is improved.
- the amount of the reference solution to be fed is set to a predetermined amount stored in advance in the supply unit, the amount of the reference solution supplied by the operator to the flow cell is adjusted for each measurement as in the past. There is no hassle.
- the operator can easily perform liquid feeding in accordance with the work, so that no mistake occurs in the work.
- the operator can adjust the timing of liquid delivery according to the work, and the reference solution can be flowed immediately before the measurement, so that the detection part of the flow path is not exposed to the reference solution for a long time, and the measurement can be performed. Accuracy is increased.
- the reference solution communicated with the first transfer unit and sucked into the flow path is sucked and supplied to the supply unit following the reference solution.
- a second transfer unit that supplies the sample solution to the detection unit of the flow path may be provided.
- the second transfer unit sends the sample solution supplied to the supply unit following the reference solution to the detection unit of the flow path. Therefore, unlike the conventional case, there is no need for a complicated apparatus configuration in which pressure is applied to the flow path by using a syringe pump or the like from the outside of the flow cell and the reference solution and the sample solution are fed, and the equipment cost is reduced.
- the supply unit has an amount of a part of which remains in the supply unit in an equilibrium state in which the reference solution is supplied to the flow path and the liquid supply is stopped.
- the reference solution may be stored.
- the amount of the reference solution stored in the supply unit is set so that a part of the reference solution remains in the supply unit in an equilibrium state in which the liquid supply is stopped.
- the following problems as in the prior art do not occur. That is, the operator passively works while paying attention to the amount of decrease in the reference solution remaining in the supply unit, and the sample solution is supplied in an empty state after the reference solution has been completely transferred from the supply unit. As a result, a gap is formed between the solutions flowing through the flow path, causing a large change in the measurement result called so-called injection shock, and the measurement result of the reference solution and the measurement result of the sample solution. There is no such a situation that a small amount of change cannot be compared.
- the operator who sent the reference solution can supply the next sample solution to the flow cell in accordance with the work and actively send the solution, the work can be done easily without requiring the operator. At the same time, sufficient measurement accuracy is ensured.
- the storage unit is formed of a sealed container-like liquid sealing member connected to the supply unit, and the liquid sealing member is opened to store in the supply unit.
- the reference solution may be sent to the detection unit.
- the storage part is made of a sealed container-like liquid sealing member such as an ampule or a microcapsule, and the inside of the liquid sealing member communicates with the supply part to store the reference solution.
- the liquid sealing member is opened, outside air is sucked from the opened portion, and the reference solution stored in the supply unit is sent to the detection unit of the flow path.
- the workability is excellent because the reference solution can be flowed to the detection unit simply by opening the liquid seal member.
- the storage unit includes a sheet-shaped supply unit sealing member that seals the opening of the supply unit, and the supply unit sealing member is opened.
- the reference solution stored in the supply unit may be sent to the detection unit.
- the storage part is made of a sheet-like supply part sealing member such as an adhesive tape, for example, and this supply part sealing member is adhered so as to seal the opening of the supply part. And if the supply part sealing member is peeled off from the supply part and opened in accordance with the work, the reference part stored so that the supply part sucks outside air from the opening part is sent to the detection part of the flow path. With a simple structure, liquid can be sent easily and manufacturing costs are reduced.
- the first transfer unit includes a first through hole having one end communicating with the flow path and the other end opening to the outside air
- the storage unit includes the first transfer unit. It consists of the 1st sealing member which seals opening of a through-hole, and the said reference solution stored in the said supply part may be sent to the said detection part by opening the said 1st sealing member.
- the storage portion is made of a first sealing member such as an adhesive tape, for example, and the first sealing member is adhered so as to seal the opening of the first through hole. Then, if the first sealing member is peeled from the first through hole and opened in accordance with the work, the reference solution stored so that the supply unit sucks the outside air is sent to the detection unit of the flow path. With the configuration, the liquid can be fed easily, and the manufacturing cost is reduced.
- a first sealing member such as an adhesive tape, for example
- the second transfer unit includes a second through hole having one end communicating with the first transfer unit and the other end opening to the outside air.
- a second sealing member that seals the opening may be provided, and the sample solution supplied to the supply unit may be supplied to the detection unit by opening the second sealing member.
- the second transfer part is composed of the second through hole, and the opening of the second through hole is sealed by the second sealing member such as an adhesive tape.
- the sample solution supplied to the supply unit later is not supplied to the flow path but is stored in the supply unit until the second sealing member is peeled off from the second through hole and opened. That is, the second sealing member is peeled off from the second through hole and opened, so that the sample solution stored so that the supply unit sucks outside air is sent to the detection unit of the flow path. Therefore, it is possible to actively control the timing of feeding the sample solution with a simple configuration, the measurement accuracy is improved, and the workability is improved.
- a cross-sectional area of the flow path in a region where the detection unit is provided is smaller than a cross-sectional area of the flow path in a region where the detection unit is not provided. Also good.
- the opening state of the sealing member may be controlled by an external device.
- a sample solution and a reference solution that has properties similar to the sample solution and are used for comparison of measurement are supplied to a supply unit, and a flow path is provided.
- a transfer unit communicating with the supply unit via the suction unit sucks the sample solution and the reference solution of the supply unit, guides them to the flow path, and supplies the flow to the detection unit facing the flow path.
- the reference solution is supplied to the supply unit, and a part of the sealing member that seals the plurality of openings of the transfer unit is opened to suck the reference solution and to detect the detection unit.
- a reference solution having properties similar to a sample solution and the sample solution are sequentially supplied to a supply unit communicating with one end of a flow path.
- a flow cell feeding method for leading to a path and feeding to a detection unit facing the channel, wherein the supply unit stores the reference solution and opens the storage unit to open the other channel.
- the timing of feeding the sample solution and the amount of the delivered solution can be adjusted according to the work, and the operator can be measured easily and accurately without the need for skill, improving workability. can do.
- the timing and amount of feeding of the sample solution and the timing and amount of feeding of the reference solution can be adjusted according to the work.
- the sample solution and the reference solution are not mixed in the unit, and no gap is formed between the sample solution flowing through the flow path and the reference solution. In addition to superiority, measurement accuracy is improved.
- the operator since the storage unit for storing the reference solution in the supply unit is provided, the operator supplies the reference solution to the supply unit each time during measurement. There is no such need, and the stored reference solution can be sent to the detection part of the flow path simply by opening the storage part. Therefore, the workability of measurement can be improved with a simple configuration.
- the operator since a predetermined amount of the reference solution stored in advance in the supply unit is delivered by opening the storage unit, the operator can actively control the timing of delivery and the amount of delivery, thereby improving measurement accuracy. It has been.
- FIG. 1 It is explanatory drawing which shows schematic structure of the SPR measuring apparatus using the flow cell which concerns on the 1st Embodiment of this invention. It is a characteristic view explaining the relationship between the reflectance of a detection part and reflection angle which were measured with the SPR measuring device.
- FIG. 7 is a side sectional view taken along the line A1-A1 of FIG.
- FIG. 7 is a side sectional view taken along the line B1-B1 of FIG.
- FIG. 10 is a side sectional view taken along the line C1-C1 of FIG.
- It is explanatory drawing which shows schematic structure of the SPR measuring apparatus using the flow cell which concerns on the 4th Embodiment of this invention. It is a characteristic view explaining the relationship between the reflectance of a detection part and reflection angle which were measured with the SPR measuring device. It is a disassembled perspective view which shows schematic structure of the flow cell which concerns on the 4th Embodiment of this invention.
- FIG. 15 is a side sectional view showing an arrow A2-A2 in FIG. It is a sectional side view which shows the B2-B2 arrow of FIG. It is a sectional side view explaining the equilibrium state before the reference solution of the flow cell concerning the 4th Embodiment of this invention is sent to a detection part. It is a sectional side view explaining the equilibrium state after the reference solution of the flow cell concerning the 4th Embodiment of this invention is sent to the detection part. It is a disassembled perspective view which shows schematic structure of the flow cell which concerns on the 5th Embodiment of this invention.
- FIG. 1 is an explanatory diagram showing a schematic configuration of an SPR measurement device using a flow cell according to the first embodiment of the present invention.
- FIG. 2 is a characteristic diagram for explaining the relationship between the reflectance and the reflection angle of the detection unit measured by the SPR measurement device.
- FIG. 3 is an exploded perspective view showing a schematic configuration of the flow cell according to the first embodiment of the present invention.
- FIG. 4 is a plan view showing a schematic configuration of the flow cell according to the first embodiment of the present invention.
- the flow cell 1 of the present embodiment uses a so-called surface plasmon resonance (SPR) phenomenon, which is a resonance between an evanescent wave and a surface plasmon wave on the surface of a metal thin film in contact with a sample to be measured (DNA, antibody, etc.).
- SPR surface plasmon resonance
- this SPR measurement apparatus 100 polarizes light emitted from a light source 101 with a polarizer (not shown) to obtain P-polarized light (hereinafter referred to as “incident light”). Then, the SPR measuring apparatus 100 causes the band-shaped incident light condensed by the condenser lens 102 to enter the curved surface side of the semi-cylindrical prism 103. Then, the SPR measurement device 100 irradiates a metal thin film (described later) of the flow cell 1 that is in close contact with the measurement surface 103a on the flat surface side of the prism 103. Then, the SPR measurement device 100 detects the reflected light with the light receiving unit 104 formed of a CCD image sensor.
- the reflection intensity decreases at the angle at which the resonance occurs (resonance angle). Is done.
- the resonance angle depends on the optical property (refractive index) of the sample solution in contact with the metal thin film. Therefore, a specific substance can be quantitatively measured by immobilizing an antibody on a metal thin film and measuring the refractive index change due to the binding between the antibody and the antigen.
- the flow cell 1 mounted on the SPR measuring device 100 has a substantially rectangular parallelepiped shape or a substantially rectangular plate shape and has a laminated structure. That is, in a state where the flow cell 1 is placed on the SPR measuring device 100, the lower substrate 2 having a substantially rectangular plate shape disposed on the lower side, and the outer shape in plan view stacked on the lower substrate 2 are And an upper substrate 3 formed substantially the same.
- the thickness of the lower substrate 2 is about 1 mm
- the thickness of the upper substrate 3 is about 3 mm.
- the upper substrate 3 is a sample to be measured on one end side (upper right side in FIG. 3 or upper side in FIG. 4) of the substantially center in the width direction (upper left-lower right direction in FIG. 3 or left / right direction in FIG. 4) in the plan view.
- a hole (supply unit) 4 is provided.
- the solution supply hole 4 includes a lower cylindrical hole-shaped small-diameter portion 4a and an elliptic cylinder hole-shaped large-diameter portion 4b formed above the small-diameter portion 4a and having a diameter larger than that of the small-diameter portion 4a. 3 is penetrated in the thickness direction.
- the upper substrate 3 is provided with a plurality of cylindrical hole-shaped through holes (transfer portions) 5 that penetrate the upper substrate 3 in the thickness direction. Further, as shown in FIG. 4, these through holes 5 are arranged in a substantially rectangular shape in plan view on one side (left side in FIG. 4) and the other side (right side in FIG. 4) in the width direction. Further, these through holes 5 are arranged in a straight line so as to connect opposite end portions on the other end side (the lower side in FIG. 4) of the substantially rectangular shape in plan view. These through-holes 5 are set to have an inner diameter within a range in which capillary action is exerted on each solution.
- the upper end of the through-hole 5 is an opening 6 that is open to the outside air, and the lower end communicates with a suction channel 8 described later. .
- the lower substrate 2 is composed of two layers, the lower layer is made of a base substrate 2a made of a material that transmits light such as glass or acrylic resin, and the upper layer is a spacer portion 2b such as a resin film. Consists of.
- an opening portion penetrating in the thickness direction is formed.
- a circular hole 7 having an inner diameter substantially the same as the inner diameter of the small diameter portion 4a is formed at a position corresponding to the small diameter portion 4a of the solution supply hole 4 of the upper substrate 3 in the opening portion.
- the spacer portion 2b has a substantially rectangular hole shape so as to correspond to the outer shape of the plurality of through holes 5 arranged in a substantially rectangular shape in plan view on one side and the other side in the width direction of the upper substrate 3, respectively.
- the respective suction channels 8 formed in the above are provided.
- the suction flow path 8 is set to such a height that each solution does not form a gap between the solution and the through-hole 5 thereabove when the solution is supplied. It is about 100 ⁇ m.
- a channel 9 extending in a direction orthogonal to the width direction is formed at a substantially center in the width direction of the spacer portion 2b.
- the end of one end side of the channel 9 communicates with the circular hole 7, the end of the other end side branches into one side and the other side in the width direction, and communicates with the respective suction channels 8. is doing.
- the channel 9 has a substantially rectangular cross section.
- the cross-sectional dimension perpendicular to the extending direction hereinafter abbreviated as “cross-sectional dimension” is about 1 mm in the width direction, and the plate thickness direction (height) is 10 to 10 mm. It is set to about 100 ⁇ m, and is set in a range in which capillary action is developed for each solution. In this way, the circular hole 7 connected to the solution supply hole 4 and the suction flow path 8 connected to the through hole 5 communicate with each other via the flow path 9.
- a rectangular metal thin film (detection unit) 10 is formed in the approximate center in the width direction of the upper surface of the base substrate 2a.
- the metal thin film 10 is made of, for example, Au (gold), and is disposed so as to be able to face and contact each solution flowing through the flow path 9 of the spacer portion 2b.
- a plurality of antibodies are arranged along the flow path 9 on the upper surface of the metal thin film 10.
- the metal thin film 10 is disposed so as to correspond to the region used for the measurement at the substantially center of the upper surface of the base substrate 2a.
- the metal thin film 10 is wide and large beyond the range of the region. It may be formed.
- substantially rectangular surface active regions 11 are formed in portions corresponding to the respective suction channels 8 of the spacer portion 2b on one side and the other side in the width direction of the base substrate 2a.
- the surface active region 11 is subjected to surface processing, and the wettability with respect to each solution is set to be different from that other than the surface active region 11. That is, the surface processing of the surface active region 11 is variously set, and the suction state and flow rate of each solution are changed and controlled.
- a plurality of sealing members 12 made of adhesive tape are attached to the upper surface of the upper substrate 3. These sealing members 12 are arranged to face the openings 6 of the through holes 5 of the upper substrate 3, and each sealing member 12 seals the plurality of openings 6.
- the plurality of openings 6 disposed on one end side of the upper substrate 3 are sealed with a sealing member 12 c.
- a plurality of openings 6 disposed on one end side of the other side of the upper substrate 3 are sealed with a sealing member 12d.
- the plurality of openings 6 arranged on the other end side of the sealing member 12c are sealed with the sealing member 12a.
- the plurality of openings 6 disposed on the other end side of the sealing member 12d are sealed by the sealing member 12b.
- the flow cell 1 is placed on the measurement surface 103a of the prism 103 of the SPR measurement device 100 via matching oil or the like.
- the light source 101 irradiates the metal thin film 10 of the flow cell 1 with incident light, and the reflected light is received by the light receiving unit 104 so that a change in refractive index can be measured. Keep it as
- PBS solution is supplied to the solution supply hole 4 of the placed flow cell 1.
- the supplied PBS solution flows through the flow path 9 as the flow path 9 communicating with the solution supply hole 4 develops a capillary phenomenon.
- due to the capillary phenomenon due to the penetration hole 5 disposed in the vicinity of the other end of the flow path 9 and the through hole 5 disposed at the other end of each suction flow path 8 getting wet with the PBS solution. Sucked.
- the sealing member 12a is peeled off in a state where the PBS solution is filled in all of the through holes 5 that have previously opened the opening 6, and the plurality of openings 6 sealed with the sealing member 12a are formed. Open. Thereby, the through-hole 5 corresponding to the opened opening 6 sucks the PBS liquid.
- these through holes 5 are filled with the PBS solution, capillary action does not occur, and the PBS solution is no longer sucked from the solution supply hole 4 and the liquid feeding stops.
- the amount of the PBS solution supplied to the solution supply hole 4 is set in advance so that the solution remains in the small diameter portion 4a of the solution supply hole 4 in a state where the liquid supply is stopped in this way.
- the reference solution is supplied to the solution supply hole 4 of the flow cell 1.
- the reference solution is made of a solution having a property close to that of the sample solution and does not include the specimen of the sample solution to be measured.
- the sealing member 12b is peeled in a state where the reference solution is stored in the solution supply hole 4, and the plurality of openings 6 sealed with the sealing member 12b are opened.
- the reference solution starts to be sucked by capillary action due to wetting with the PBS solution in which the through-hole 5 corresponding to the opened opening 6 remains and the subsequent reference solution, and the reference solution is applied to the metal thin film 10 facing the channel 9. Flow continuously. In this state, the first measurement of the reference solution is performed.
- the reference solution that has flowed through the metal thin film 10 is then sucked into the suction channel 8 and sucked into the open through-hole 5.
- the through solution 5 is filled with the reference solution, the capillary phenomenon does not occur, and the reference solution is no longer sucked from the solution supply hole 4 and the liquid feeding stops.
- the amount of the reference solution supplied to the solution supply hole 4 is set in advance so that the solution remains in the small diameter portion 4a of the solution supply hole 4 in a state where the liquid supply is stopped in this way.
- the sample solution is supplied to the solution supply hole 4 of the flow cell 1.
- the sealing member 12c is peeled in the state which stored the sample solution in the solution supply hole 4, and the several opening part 6 sealed with the said sealing member 12c is opened.
- the sample solution starts to be sucked by capillary action caused by wetting the reference solution in which the through-hole 5 corresponding to the opened opening 6 remains and the subsequent sample solution, and the sample solution is applied to the metal thin film 10 facing the channel 9. Flow continuously. In this state, the sample solution is measured.
- the sample solution that has flowed through the metal thin film 10 is then sucked into the suction channel 8 and sucked into the open through-hole 5.
- the through holes 5 are filled with the sample solution, the capillary phenomenon does not occur, and the sample solution is no longer sucked from the solution supply hole 4 and the liquid feeding stops.
- the amount of the sample solution supplied to the solution supply hole 4 is set in advance so that the solution remains in the small diameter portion 4a of the solution supply hole 4 in a state where the liquid supply is stopped in this way.
- a second reference solution is supplied to the solution supply hole 4 of the flow cell 1.
- the sealing member 12d is peeled in a state where the reference solution is stored in the solution supply hole 4, and a plurality of openings 6 sealed with the sealing member 12d are opened.
- the reference solution starts to be sucked by capillary action due to wetting of the sample solution in which the through-hole 5 corresponding to the opened opening 6 remains and the subsequent reference solution, and the reference solution is continuously flowed to the metal thin film 10.
- the second measurement of the reference solution is performed.
- the reference solution that has flowed through the metal thin film 10 is then sucked into the suction channel 8 and sucked into the open through-hole 5.
- the through solution 5 is filled with the reference solution, the capillary phenomenon does not occur, and the reference solution is no longer sucked from the solution supply hole 4 and the liquid feeding stops.
- the measurement result of a sample solution is calculated
- the opening 6 of the through hole 5 that sucks each solution of the sample solution, the reference solution, and the PBS solution and guides it to the flow path 9 is the sealing member 12. It is sealed by. Therefore, each solution is prevented from flowing into the flow path 9 until the sealing member 12 opens the opening 6 in a state where each solution is stored in the solution supply hole 4.
- Each of the sealing members 12a to 12d seals the plurality of openings 6, and each solution is supplied in accordance with the range in which the sealing members 12a to 12d are peeled and the openings 6 are opened. You can decide the amount.
- each solution is transferred only to the through holes 5 corresponding to the respective openings 6 opened in the respective sealing members 12a to 12d, and the liquid feeding is stopped when the through holes 5 are filled with the solution. It has become. Therefore, the operator can freely adjust the timing and amount of each solution supplied to the solution supply hole 4 in accordance with the operation.
- the operator can actively determine the timing and amount of each solution to be fed. Therefore, as in the prior art, the operator passively works while paying attention to the amount of reduction of each solution remaining in the solution supply hole 4, and all of the previously supplied solution has been transferred from the solution supply hole 4. After that, the next solution is supplied to the solution supply hole 4 in an empty state, and a gap is formed between the solutions flowing through the flow path 9, so that a large change in the measurement result called so-called injection shock occurs. It will not be generated. Therefore, it is not possible to compare a minute amount of change between the measurement result of the sample solution and the measurement result of the reference solution. Therefore, the operator does not need skill, the operation can be performed easily, and the measurement accuracy is sufficiently ensured.
- the sealing member 12 is made of an adhesive tape, and the adhesive tape can be peeled off to easily open the opening 6, the workability is good and the opening range can be set with high accuracy.
- each solution supplied to the solution supply hole 4 is continuously sucked into the flow path 9 and supplied to the metal thin film 10. It has become so. Therefore, as in the prior art, in order to continuously transfer each solution to the metal thin film 10, pressure is applied to the flow path 9 from the outside of the flow cell 1 using a syringe pump or the like, or each solution is measured. High-accuracy measurement can be performed with a simple configuration without the need for a large-scale apparatus configuration or troublesome work such as washing and drying each time.
- FIG. 5 is an exploded perspective view showing a schematic configuration of a flow cell according to the second embodiment of the present invention.
- FIG. 6 is a plan view showing a schematic configuration of a flow cell according to the second embodiment of the present invention.
- FIG. 7 is a side sectional view showing the A1-A1 arrow in FIG.
- FIG. 8 is a side sectional view showing the B1-B1 arrow of FIG.
- symbol is attached
- the upper substrate 23 of the flow cell 21 has one end side (upper right side or diagram in FIG. 5) of the substantially center in the width direction (upper left-lower right direction in FIG. 5 or left / right direction in FIG. 6). 6 is provided with a cylindrical hole-shaped solution supply hole (supply part) 24 for supplying each solution.
- the solution supply hole 24 penetrates the upper substrate 23 in the plate thickness direction.
- the upper substrate 23 has a lower side in the plate thickness direction on one side in the width direction (the lower right side in FIG. 5 or the left side in FIG. 6) and the other side (the upper left side in FIG. 5 or the right side in FIG. 6).
- a plurality of rectangular groove-shaped chambers (transfer portions) 25 that are open toward the bottom are formed. These chambers 25 are formed to extend in a direction orthogonal to the width direction, and adjacent chambers 25 are partitioned from each other by a wall portion 25a.
- an opening 26 having a substantially prismatic hole shape penetrating the upper substrate 23 in the plate thickness direction is formed at an end portion on one end side of the chamber 25.
- a plurality of openings 26 are provided corresponding to the respective chambers 25, and the upper end portion in the thickness direction is open to the outside air.
- the end portions on the other end side (the lower left side in FIG. 5 or the lower side in FIG. 6) of the plurality of chambers 25 arranged on one side communicate with each other.
- the end portions on the other end side of the plurality of chambers 25 arranged on the other side are also in communication with each other.
- each chamber 25 a plurality of substantially columnar columnar members (transfer portions) 27 are suspended from a ceiling portion which is a bottom surface. These columnar members 27 are arranged inside the chamber 25 with a gap therebetween, and are arranged linearly in a direction perpendicular to the width direction. Further, a slight gap is provided between the outer periphery of the columnar member 27 and the adjacent wall portion 25a. And the space
- a meandering groove 28 having a meandering groove shape opening toward the lower surface side in the thickness direction is formed at the other end of the upper substrate 23 in the center in the width direction.
- the meandering channel 28 is formed in a crank shape or a wave shape so as to be folded back multiple times on one side and the other side in the width direction, and each folded portion is formed in a smooth curved shape.
- the end portion on the other end side of the meandering channel 28 is branched toward one side and the other side in the width direction.
- the other end of the chamber 25 arranged on the inner side in the width direction on one side communicates with the end on the other end side of the chamber 25 arranged on the other side in the width direction.
- an end portion on one end side of the meandering flow path 28 is disposed at a substantially center of the upper substrate 23 and communicates with a flow path 30 described later.
- the cross-sectional dimension of the meandering channel 28 is set to a dimension within a range in which capillary action is developed for each solution.
- the lower substrate 22 is composed of two layers.
- the lower layer is composed of a base substrate 22a made of a material that transmits light such as glass or acrylic resin, and the upper layer is a spacer portion 22b such as a resin film. Consists of.
- an opening portion penetrating in the thickness direction is formed in the spacer portion 22b.
- a circular hole 29 having an inner diameter substantially the same as the inner diameter of the solution supply hole 24 is formed at a position corresponding to the solution supply hole 24 of the upper substrate 23 in the opening portion.
- a channel 30 extending in a direction orthogonal to the width direction is formed at a substantially center in the width direction of the spacer portion 22b.
- the end of one end of the channel 30 communicates with the circular hole 29, and the end of the other end communicates with one end of the meandering channel 28 of the spacer portion 22b.
- the channel 30 has a substantially rectangular cross section.
- the cross-sectional dimension has a width direction of about 1 mm and a plate thickness direction (height) of about 10 to 100 ⁇ m, and exhibits a capillary action for each solution.
- a rectangular metal thin film (detection unit) 31 is formed at substantially the center in the width direction of the upper surface of the base substrate 22a.
- An antibody is applied on the metal thin film 31.
- the metal thin film 31 and the antibody are arranged so as to be able to face and contact each solution flowing through the flow path 30 of the spacer portion 22b.
- a plurality of sealing members 32 made of adhesive tape are attached to the upper surface of the upper substrate 23. These sealing members 32 are arranged to face the openings 26 of the upper substrate 23, respectively, and seal the openings 26.
- the sample solution is measured by the SPR measurement device 100 using the flow cell 21 configured as described above.
- the flow cell 21 is placed on the measurement surface 103a of the prism 103 of the SPR measurement device 100 via matching oil or the like so that a change in refractive index can be measured.
- a PBS solution is supplied to the solution supply hole 24 of the placed flow cell 21.
- the supplied PBS solution flows through the flow channel 30 as the flow channel 30 communicating with the solution supply hole 24 develops a capillary phenomenon.
- the PBS liquid is sucked into the meandering flow path 28 communicating with the end portion on the other end side of the flow path 30 and sucked into the chambers 25 arranged on the one side and the other side in the width direction on the upper substrate 23. Is done.
- the PBS solution sucked into the chambers 25 in the width direction flows through the inside as each chamber 25 develops capillary action due to the wetness of the respective chambers 25 with the PBS solution. Guided to the opening 26.
- the capillary phenomenon does not occur and the feeding stops.
- the sealing member 32a When the PBS member was supplied to each chamber 25 arranged inward in the width direction, the sealing member 32a was peeled off, and the opening 26 sealed by the sealing member 32a was opened.
- the chamber 25 corresponding to the opening 26 sucks the PBS solution.
- the chamber 25 When the chamber 25 is filled with the PBS solution, capillary action does not occur, and the PBS solution is no longer sucked from the solution supply hole 24 and the liquid feeding stops.
- the amount of the PBS solution supplied to the solution supply hole 24 is set in advance so that the solution remains slightly in the solution supply hole 24 in a state where the liquid supply is stopped in this way.
- the reference solution is supplied to the solution supply hole 24 of the flow cell 21.
- the sealing member 32b is peeled in the state which stored the reference solution in the solution supply hole 24, and the opening part 26 sealed with the said sealing member 32b is opened.
- the reference solution is started to be sucked by capillary action due to the wetting of the PBS solution remaining in the chamber 25 corresponding to the opened opening 26 and the subsequent reference solution, and the reference solution is applied to the metal thin film 31 facing the channel 30. Run continuously. In this state, the first measurement of the reference solution is performed.
- the reference solution that has flowed through the metal thin film 31 is then sucked into the meandering flow path 28 and sucked into the chamber 25 corresponding to the opening 26 that opened.
- the capillary phenomenon does not occur, the reference solution is no longer sucked from the solution supply hole 24, and the liquid feeding stops.
- the amount of the reference solution supplied to the solution supply hole 24 is set in advance so that the solution remains slightly in the solution supply hole 24 in a state where the liquid supply is stopped in this way.
- the sample solution is supplied to the solution supply hole 24 of the flow cell 21.
- the sealing member 32c is peeled in the state which stored the sample solution in the solution supply hole 24, and the opening part 26 sealed with the said sealing member 32c is opened.
- the sample solution begins to be sucked by capillary action due to the wetness of the reference solution and the subsequent sample solution in which the chamber 25 corresponding to the opened opening 26 remains, and the sample solution is continuously applied to the metal thin film 31 of the channel 30. Shed. In this state, the sample solution is measured.
- the sample solution that has flowed through the metal thin film 31 is sucked into the meandering flow path 28 and sucked into the chamber 25 having the opening 26 opened.
- the sample solution is no longer sucked from the solution supply hole 24 and the liquid feeding stops.
- the amount of the sample solution supplied to the solution supply hole 24 is set in advance so that the solution remains slightly in the solution supply hole 24 in a state where the liquid supply is stopped in this way.
- a second reference solution is supplied to the solution supply hole 24 of the flow cell 21.
- the sealing member 32d is peeled off in a state where the reference solution is stored in the solution supply hole 24, and the opening 26 sealed with the sealing member 32d is opened.
- the reference solution starts to be sucked by capillary action due to wetting of the sample solution in which the chamber 25 corresponding to the opened opening 26 remains and the subsequent reference solution, and the reference solution is continuously passed through the metal thin film 31.
- the second measurement of the reference solution is performed.
- the reference solution that has flowed through the metal thin film 31 is sucked into the meandering flow path 28 and sucked into the chamber 25 having the opening 26 opened.
- the reference solution is no longer sucked from the solution supply hole 24 and liquid feeding stops.
- the measurement result of a sample solution is calculated
- the third and fourth reference solutions may be passed through the metal thin film 31 for measurement. If the measurement result of the sample solution is obtained using the measurement results of the first to fourth reference solutions, more accurate measurement can be performed.
- each chamber 25 has an opening 26.
- the respective sealing members 32 corresponding to the openings 26 are peeled to open the openings 26, and each solution is sucked up from the flow path 30 and supplied to the metal thin film 31. Since the liquid feeding stops when the chamber 25 corresponding to the opened opening 26 is filled with each solution, the same effect as in the first embodiment described above is achieved.
- FIG. 9 is a plan view showing a schematic configuration of a flow cell according to the third embodiment of the present invention.
- FIG. 10 is a side sectional view showing the arrow C1-C1 in FIG.
- symbol is attached
- the upper substrate 43 of the flow cell 41 of the third embodiment is made of a resin material or the like.
- a rectangular groove shape that opens toward the lower surface side in the plate thickness direction on one side (left side in FIG. 9) and the other side (right side in FIG. 9) in the width direction (left-right direction in FIG. 9) of the flow cell 41 in plan view.
- a plurality of chambers (transfer sections) 45 are provided. These chambers 45 are formed to extend in a direction orthogonal to the width direction, and the adjacent chambers 45 are separated from each other by a wall portion 45a.
- a substantially cylindrical hole-shaped recess (opening) 46 that opens toward the lower surface in the thickness direction is formed at the end of one end side (upper side in FIG. 9) of the chamber 45.
- a plurality of the concave portions 46 are provided corresponding to the respective chambers 45, and the upper end portion in the thickness direction, which is the bottom surface thereof, is a base end portion of the sealing member 52 made of a resin material having a substantially round bar shape or a truncated cone shape. And is sealed.
- each chamber 45 a plurality of substantially columnar columnar members (transfer portions) 47 are suspended. These columnar members 47 are arranged inside the chamber 45 with a gap therebetween, and are arranged linearly in a direction orthogonal to the width direction. Further, a slight gap is provided between the outer periphery of the columnar member 47 and the adjacent wall portion 45a. And the space
- the sample solution is measured by the SPR measuring device 100 using the flow cell 41 configured as described above.
- the flow cell 41 is placed on the measurement surface 103a of the prism 103 of the SPR measurement device 100 via matching oil or the like so that a change in refractive index can be measured.
- PBS solution is supplied to the solution supply hole 24 of the placed flow cell 41.
- the supplied PBS solution is not sent to the flow path 30 but is stored in the solution supply hole 24.
- the tip end portion of the sealing member 52a disposed on the inner side in the width direction on one side of the sealing member 52 is tilted as shown in FIG. And the base end part is isolate
- the PBS solution is sucked by capillary action due to the chamber 45 corresponding to the recess 46 where the sealing member 52a is opened getting wet with the PBS solution.
- the chamber 45 is filled with the PBS solution, capillary action does not occur, and the PBS solution is no longer sucked from the solution supply hole 24, and the liquid feeding stops.
- the amount of the PBS solution supplied to the solution supply hole 24 is set in advance so that the solution remains slightly in the solution supply hole 24 in a state where the liquid supply is stopped in this way.
- the reference solution is supplied to the solution supply hole 24 of the flow cell 41. Then, with the reference solution stored in the solution supply hole 24, the tip portion of the sealing member 52b disposed on the other side in the width direction is tilted. And the base end part is isolate
- the reference solution is started to be sucked by capillary action due to wetting of the remaining PBS solution and the subsequent reference solution in the chamber 45 corresponding to the recess 46 where the sealing member 52b is opened.
- the reference solution is continuously passed through the metal thin film 31 facing the flow path 30. In this state, the first measurement of the reference solution is performed.
- the capillary phenomenon does not occur, the reference solution is no longer sucked from the solution supply hole 24, and the liquid feeding stops.
- the amount of the reference solution supplied to the solution supply hole 24 is set in advance so that the solution remains slightly in the solution supply hole 24 in a state where the liquid supply is stopped in this way.
- the sample solution is supplied to the solution supply hole 24 of the flow cell 41. Then, in a state where the sample solution is stored in the solution supply hole 24, the distal end portion of the sealing member 52c adjacent to one side of the sealing member 52a is tilted and the proximal end portion is separated from the recess 46, and the proximal end The concave portion 46 sealed with the portion is opened to the outside air.
- the sample solution begins to be sucked by capillary action due to wetting of the reference solution and the subsequent sample solution in which the chamber 45 corresponding to the recess 46 where the sealing member 52c is opened remains.
- the sample solution is continuously passed through the metal thin film 31 facing the flow path 30. In this state, the sample solution is measured.
- the amount of the sample solution supplied to the solution supply hole 24 is set in advance so that the solution remains slightly in the solution supply hole 24 in a state where the liquid supply is stopped in this way.
- a second reference solution is supplied to the solution supply hole 24 of the flow cell 41.
- the distal end portion of the sealing member 52 d adjacent to the other side of the sealing member 52 b is tilted and the base end portion is separated from the recess 46. Thereby, the recessed part 46 sealed with the said base end part is opened to external air.
- the reference solution starts to be sucked by capillary action due to wetting of the sample solution in which the chamber 45 corresponding to the concave portion 46 opened by the sealing member 52d remains and the subsequent reference solution.
- the reference solution is continuously passed through the metal thin film 31 facing the flow path 30. In this state, the second measurement of the reference solution is performed.
- the capillary phenomenon does not occur, the reference solution is no longer sucked from the solution supply hole 24, and the liquid feeding stops.
- the measurement result of a sample solution is calculated
- the measurement may be performed by flowing the third and fourth reference solutions to the metal thin film 31 using the sealing members 52e and 52f. If the measurement result of the sample solution is obtained using the measurement results of the first to fourth reference solutions, more accurate measurement can be performed.
- the sealing member 52 is made of a substantially round bar-like resin material or the like, and its base end portion closes and seals the recess 46. And if the front-end
- the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
- the order of opening the openings 6 and 26 and the recess 46 is not limited to the first to third embodiments, and may be appropriately changed in view of the workability of the operator.
- the shape, quantity and arrangement of the openings 6 and 26 and the recess 46 may be appropriately set according to various measurements.
- the sealing members 12 and 32 are adhesive tapes attached to the openings 6 and 26, and the sealing member 52 is a resin material that closes the recess 46.
- the opening members 6, 26 and the recesses 46 are formed of a sealing member made of a movable arm or a clamp plate that is installed in the SPR measurement device 100 in advance. Therefore, it may be mechanically closed and sequentially opened in accordance with the timing of feeding each solution.
- the through-hole 5, the chambers 25 and 45, and the columnar members 27 and 47 are described as being a transfer unit that sucks each solution and guides it to the flow paths 9 and 30.
- the present invention is not limited to these, and for example, it may be configured by a flow path or a cavity that expresses capillary action and sucks each solution.
- the shape, quantity, and arrangement of the through-hole 5, the chambers 25, 45, and the columnar members 27, 47 are not limited to the present embodiment.
- the flow cell has been described as being used in the SPR measurement device 100, but the present invention can also be applied to other devices that flow and measure a sample solution. That is, for example, it can be applied in the field of handling sample solutions such as micro TAS, Lab on a chip, micro combinatorial chemistry, chemical IC, chemical sensor, biosensor, trace analysis, electrochemical analysis, chromatography, QCM measurement, ATR measurement, etc. It is.
- FIG. 11 is an explanatory diagram showing a schematic configuration of an SPR measurement device using a flow cell according to the fourth embodiment of the present invention.
- FIG. 12 is a characteristic diagram for explaining the relationship between the reflectance and the reflection angle of the detection unit measured by the SPR measurement device.
- FIG. 13 is an exploded perspective view showing a schematic configuration of a flow cell according to the fourth embodiment of the present invention.
- FIG. 14 is a plan view showing a schematic configuration of a flow cell according to the fourth embodiment of the present invention.
- FIG. 15 is a side sectional view showing the A2-A2 arrow in FIG.
- FIG. 16 is a side sectional view showing the arrow B2-B2 in FIG.
- FIG. 17 is a side sectional view for explaining an equilibrium state before the reference solution of the flow cell according to the fourth embodiment of the present invention is sent to the detection unit.
- FIG. 18 is a side cross-sectional view illustrating an equilibrium state after the reference solution of the flow cell according to the fourth embodiment of the present invention has been sent to the detection unit.
- the flow cell 201 of the present embodiment is applied to an SPR measurement apparatus 300 that uses a so-called surface plasmon resonance (SPR) phenomenon, which is a resonance between an evanescent wave and a surface plasmon wave on the surface of a metal thin film that is in contact with a specimen to be measured. Used for measurement.
- SPR surface plasmon resonance
- the SPR measurement apparatus 300 polarizes light emitted from the light source 301 by a polarizer (not shown) to obtain P-polarized light (hereinafter referred to as “incident light”). Then, the SPR measuring apparatus 300 causes the band-shaped incident light collected by the condenser lens 302 to enter the curved surface side of the semi-cylindrical prism 303. Then, the SPR measurement device 300 irradiates a metal thin film (to be described later) of the flow cell 201 that is in close contact with the measurement surface 303a on the plane side of the prism 303. Then, the SPR measurement device 300 detects the reflected light by the light receiving unit 304 including a CCD image sensor.
- the reflection intensity decreases at the angle at which the resonance occurs (resonance angle), so that a valley 305 having a low reflectance is observed. Is done.
- the resonance angle depends on the optical property (refractive index) of the sample solution in contact with the metal thin film. Therefore, a specific substance can be quantitatively measured by immobilizing an antibody on a metal thin film and measuring the refractive index change due to the binding between the antibody and the antigen.
- the flow cell 201 mounted on the SPR measuring device 300 has a substantially rectangular parallelepiped shape or a substantially rectangular plate shape and has a laminated structure. That is, with the flow cell 201 placed on the SPR measuring device 300, the lower substrate 202 having a substantially rectangular plate shape disposed on the lower side, and the outer shape in plan view stacked on the upper side of the lower substrate 202 are And an upper substrate 203 formed substantially the same.
- the thickness of the lower substrate 202 is about 1 mm
- the thickness of the upper substrate 203 is about 3 mm.
- the upper substrate 203 is a sample to be measured on one end side (upper right side in FIG. 13 or upper side in FIG. 14) of the substantially center in the width direction in the plan view (upper left-lower right direction in FIG. 13 or left / right direction in FIG. 14).
- a cylindrical hole-shaped solution supply hole (supply unit) 204 for supplying each of the solution and the reference solution is provided.
- the reference solution is a solution that has properties similar to the sample solution and does not include the specimen of the sample solution to be measured.
- the solution supply hole 204 penetrates the upper substrate 203 in the plate thickness direction.
- the upper substrate 203 is provided with a plurality of first through holes (first transfer portions) 205 and second through holes (second transfer portions) 206 each having a cylindrical hole shape, and penetrates the upper substrate 203 in the plate thickness direction. is doing.
- the plurality of second through holes 206 are arranged in a substantially rectangular shape in plan view on one side (left side in FIG. 14) and the other side (right side in FIG. 14) in the width direction.
- These second through holes 206 are aggregates of capillaries for sucking the sample solution supplied to the solution supply holes 204.
- These second through-holes 206 are set to have an inner diameter within a range in which each second through-hole 206 is wetted with respect to the sample solution and exhibits a capillary phenomenon that sucks the sample solution.
- These second through-holes 206 are opened at the upper end to the outside air and communicated with a suction channel 208 described later at the lower end.
- first through holes 205 are arranged in a direction orthogonal to the width direction on the other end side (lower side in FIG. 14) at the substantially center in the width direction.
- These first through holes 205 are aggregates of capillaries that suck the reference solution supplied to the solution supply holes 204.
- These first through-holes 205 are set to have an inner diameter in a range in which each first through-hole 205 is wetted with respect to the reference solution and exhibits a capillary phenomenon that sucks the reference solution.
- These first through holes 205 have upper ends opened to the outside air and lower ends communicating with a flow path 209 described later.
- the lower substrate 202 is composed of two layers.
- the lower layer is made of a base substrate 202a made of a material that transmits light such as glass or acrylic resin, and the upper layer is a spacer portion 202b such as a resin film. Consists of.
- the spacer portion 202b has an opening that penetrates in the thickness direction.
- a circular hole 207 having an inner diameter substantially the same as the inner diameter of the solution supply hole 204 is formed at a position corresponding to the solution supply hole 204 of the upper substrate 203 in the opening portion.
- the spacer 202b has a substantially rectangular hole shape corresponding to the outer shape of the plurality of second through holes 206 arranged in a substantially rectangular shape in plan view on one side and the other side in the width direction of the upper substrate 203.
- Each formed suction channel 208 is provided.
- the suction channel 208 is set to a height that does not form a gap with the second through-hole 206 above when the sample solution is supplied.
- the height in the plate thickness direction is 10 About 100 ⁇ m.
- a channel 209 extending in a direction orthogonal to the width direction is formed at a substantially center in the width direction of the spacer portion 202b.
- the flow path 209 has an end portion on one end side communicating with the circular hole 207, and an end portion on the other end side is branched into one side and the other side in the width direction to communicate with the respective suction flow paths 208. is doing.
- a first through hole 205 of the upper substrate 203 is disposed above the vicinity of the end portion on the other end side of the flow path 209.
- the channel 209 has a substantially rectangular cross section.
- the width direction of the cross section dimension orthogonal to the extending direction is about 1 mm
- the plate thickness direction (height) is about 10 to 100 ⁇ m. It is set in a range where capillary action is manifested.
- the solution supply hole 204 and the first through hole 205 are communicated with each other via the circular hole 207 and the flow path 209.
- the first through hole 205 and the second through hole 206 communicate with each other through the flow path 209 and the suction flow path 208.
- a rectangular metal thin film (detection unit) 210 is formed in the approximate center of the upper surface of the base substrate 202a in the width direction.
- the metal thin film 210 is made of, for example, Au (gold) and is disposed so as to be able to face and contact each solution flowing through the flow path 209 of the spacer portion 202b.
- a plurality of antibodies are arranged along the flow path 209 on the upper surface of the metal thin film 210.
- the metal thin film 210 is disposed so as to correspond to the region used for the measurement at the substantially center of the upper surface of the base substrate 202a.
- the metal thin film 210 is wide and large beyond the range of the region. It may be formed.
- substantially rectangular surface active regions 211 are formed in portions corresponding to the respective suction channels 208 of the spacer portion 202b on one side and the other side in the width direction of the base substrate 202a.
- the surface active region 211 is subjected to surface processing, and the wettability with respect to the sample solution is set to be different from the region other than the surface active region 211. That is, the surface processing of the surface active region 211 is variously set, and the suction state and flow rate of the sample solution are changed and controlled.
- an ampoule (reservoir) 212 that fits into the solution supply hole 204 is disposed on the upper surface of the upper substrate 203.
- the ampoule 212 is a hermetically sealed container-like liquid seal member capable of storing a reference solution therein, and has a substantially multi-stage cylindrical main body part 212a and a substantially truncated conical protrusion 212b communicating with the upper surface side of the main body part 212a. It consists of.
- the lower end portion of the main body portion 212a is formed to have a slightly smaller outer diameter, is approximately the same size as the inner diameter of the solution supply hole 204, and opens downward.
- the base end portion connected to the main body portion 212a of the protruding portion 212b has a slightly smaller outer diameter.
- a predetermined amount of a reference solution to be described later is stored in advance in the body 212a of the ampoule 212 and in the solution supply hole 204.
- the lower end of the stored reference solution remains on one end side of the flow path 209. Until the protrusion 212b of the ampoule 212 is separated from the main body 212a and the main body 212a is opened, the state shown in FIG. 17 is maintained without being fed to the metal thin film 210 of the flow path 209.
- the flow cell 201 is placed on the measurement surface 303a of the prism 303 of the SPR measurement device 300 via matching oil or the like.
- the light source 301 irradiates the metal thin film 210 of the flow cell 201 with incident light, and the reflected light is received by the light receiving unit 304 so that a change in refractive index can be measured. Keep it as
- the protrusion 212b of the ampoule 212 of the solution supply hole 204 of the placed flow cell 201 is tilted to be separated from the main body 212a, and the main body 212a is opened.
- the reference solution stored so that the solution supply hole 204 sucks outside air is sent to the flow path 209. That is, the reference solution is guided to the channel 209 as the channel 209 communicating with the solution supply hole 204 develops a capillary phenomenon.
- the first through-hole 205 disposed in the vicinity of the end on the other end side of the flow path 209 is sucked by capillary action due to getting wet with the reference solution, and continuously fed to the metal thin film 210. In this state, the reference solution is measured.
- the feeding of the reference solution is stopped.
- the reference solution remains slightly at the bottom of the solution supply hole 204 and does not reach the opening at the upper end of the first through hole 205. That is, the amount of the reference solution stored in the ampoule 212 in advance is set to a level that slightly remains in the solution supply hole 204 in the equilibrium state after the liquid feeding shown in FIG.
- the sample solution is supplied to the solution supply hole 204 of the flow cell 201.
- the reference solution already sent to the flow path 209 is sucked as the first through-hole 205 again exhibits the capillary phenomenon, and the sample solution is guided to the flow path 209. .
- the capillary phenomenon of the first through hole 205 does not appear.
- the sample solution is sucked and guided to the flow path 209 by capillary action due to the wetness of the reference solution and the subsequent sample solution in which the second through-hole 206 communicating with the first through-hole 205 remains, and the metal thin film 210 continuously. To liquid. In this state, the sample solution is measured.
- the ampoule 212 is provided in communication with the solution supply hole 204 so as to store the reference solution in the solution supply hole 204.
- the ampoule 212 By opening the upper surface of the main body portion 212a of the ampoule 212, outside air is sucked from the opened portion and the stored reference solution is allowed to flow through the metal thin film 210 of the flow path 209. Therefore, at the time of measurement, the operator does not need to supply the reference solution from the outside to the flow cell 201 each time, and the stored reference solution can be sent to the metal thin film 210 only by a simple operation of opening the ampoule 212.
- the amount of the reference solution to be fed is set to a predetermined amount stored in the solution supply hole 204 in advance, the amount of the reference solution supplied to the flow cell 201 by the operator is measured every time as in the past. There is no hassle to adjust each time. Further, the amount of the reference solution stored in the solution supply hole 204 is set so that a part of the reference solution remains in the solution supply hole 204 in an equilibrium state in which the liquid supply is stopped. Therefore, when the sample solution is supplied following the reference solution, the following problems as in the conventional case do not occur.
- the operator who sent the reference solution can supply the next sample solution to the flow cell 201 in accordance with the work and actively feed the solution, the work is not required for the worker and the work is simple. It can be performed and sufficient measurement accuracy is ensured.
- the operator can easily perform liquid feeding in accordance with the work, so that no mistake occurs in the work. .
- the timing of liquid feeding can be adjusted according to the work, the reference solution can be flowed and measured immediately before the measurement of the sample solution, and the metal thin film 210 in the channel 209 may be exposed to the reference solution for a long time.
- the accuracy of measurement is improved. That is, for example, the reference solution is stored and stored in advance in the flow path 209 of the flow cell 201.
- the metal thin film 210 facing the flow path 209 is formed. It will be exposed to the reference solution for a long time. Therefore, it is conceivable that the activity of the antibody on the metal thin film 210 is lowered and affects the measurement accuracy. However, in this embodiment, since the reference solution is sent to the metal thin film 210 in the flow path 209 immediately before the measurement, sufficient measurement accuracy is ensured.
- FIG. 19 is an exploded perspective view showing a schematic configuration of a flow cell according to the fifth embodiment of the present invention.
- FIG. 20 is a plan view showing a schematic configuration of a flow cell according to the fifth embodiment of the present invention.
- FIG. 21 is a side sectional view for explaining an equilibrium state before the reference solution of the flow cell according to the fifth embodiment of the present invention is sent to the detection unit.
- FIG. 22 is a side sectional view for explaining an equilibrium state after the reference solution of the flow cell according to the fifth embodiment of the present invention has been fed to the detection unit.
- symbol is attached
- a sheet-like supply unit made of a substantially circular adhesive tape having a diameter larger than the inner diameter of the solution supply hole 204.
- a sealing member (reservoir) 222 is attached so as to seal the opening of the solution supply hole 204.
- the supply portion sealing member 222 is peeled from the upper substrate 203 so that the solution supply hole 204 can be opened.
- the supply portion sealing member 222 is opened in the solution supply hole 204 in a state where a predetermined amount of the reference solution is stored in the solution supply hole 204 in advance. It sticks so that it may seal. Then, the stored reference solution stays at one end of the flow path 209 and maintains the state shown in FIG. That is, the reference solution is not fed to the metal thin film 210 in the flow path 209 until the supply portion sealing member 222 is peeled from the upper substrate 203 and the solution supply hole 204 is opened.
- incident light is irradiated from the light source 301 onto the metal thin film 210 of the flow cell 221 with the flow cell 221 placed on the measurement surface 303 a of the prism 303 of the SPR measurement device 300 via matching oil or the like. Then, the reflected reflected light is received by the light receiving unit 304 so that a change in refractive index can be measured.
- the supply portion sealing member 222 of the solution supply hole 204 of the placed flow cell 221 is peeled off, and the solution supply hole 204 is opened.
- the solution supply hole 204 is thus opened, the first through hole 205 sucks up the reference solution.
- the reference solution stored so that the solution supply hole 204 sucks outside air is sent to the metal thin film 210 of the flow path 209. In this state, the reference solution is measured.
- the reference solution is set to remain slightly at the bottom of the solution supply hole 204 in a state where the liquid feeding is stopped.
- the sample solution is supplied to the solution supply hole 204 of the flow cell 221.
- the supplied sample solution is guided to the channel 209 and continuously sent to the metal thin film 210. In this state, the sample solution is measured.
- the opening of the solution supply hole 204 storing the reference solution is sealed by the supply portion sealing member 222.
- the supply portion sealing member 222 is peeled off from the solution supply hole 204 and opened in accordance with the work, the reference solution stored so that the solution supply hole 204 sucks outside air from the opening portion is used as the metal thin film 210 of the flow path 209.
- liquid feeding can be easily performed with a simple configuration, and manufacturing costs can be reduced.
- FIG. 23 is an exploded perspective view showing a schematic configuration of a flow cell according to the sixth embodiment of the present invention.
- FIG. 24 is a plan view showing a schematic configuration of a flow cell according to the sixth embodiment of the present invention.
- FIG. 25 is a side sectional view for explaining an equilibrium state before the reference solution of the flow cell according to the sixth embodiment of the present invention is sent to the detection unit.
- FIG. 26 is a side sectional view for explaining an equilibrium state after the reference solution of the flow cell according to the sixth embodiment of the present invention has been fed to the detection unit.
- symbol is attached
- a first sealing member (reservoir) 232 made of a substantially rectangular adhesive tape has a first penetration. It sticks so that the opening of the hole 205 may be sealed. Then, the first through-hole 205 can be opened by peeling the first sealing member 232 from the upper substrate 203.
- a pair of second sealing members (reservoirs) 233 made of a substantially rectangular adhesive tape are arranged in a substantially rectangular shape on one side in the width direction (left side in FIG. 24).
- a portion corresponding to the outer shape of the second through-hole 206 and a portion corresponding to the outer shape of the second through-hole 206 arranged in a substantially rectangular shape on the other side (the right side in FIG. 24) are pasted, respectively. 2
- the opening of the through-hole 206 is sealed.
- These second sealing members 233 are peeled off from the upper substrate 203 so that the respective second through holes 206 can be opened.
- the 1st sealing member 232 is affixed on opening of the upper end of the 1st through-hole 205, the said 1st through-hole 205 is sealed, and also width
- the second through-holes 206 are sealed by adhering the respective second sealing members 233 to the openings of the second through-holes 206 on one side in the direction and the openings of the second through-holes 206 on the other side.
- a predetermined amount of reference solution is stored in the solution supply port 204. Then, the reference solution stored in the solution supply hole 204 stays at one end side of the flow path 209 and maintains the state shown in FIG.
- the sample solution is measured by the SPR measurement device 300 using the flow cell 231 configured as described above.
- incident light is irradiated from the light source 301 to the metal thin film 210 of the flow cell 231.
- the reflected reflected light is received by the light receiving unit 304 so that a change in refractive index can be measured.
- the first sealing member 232 of the first through hole 205 of the placed flow cell 231 is peeled off, and the first through hole 205 is opened.
- the first through hole 205 sucks up the reference solution.
- the reference solution stored so that the solution supply hole 204 sucks outside air is sent to the metal thin film 210 of the channel 209. In this state, the reference solution is measured.
- the reference solution is set to remain slightly at the bottom of the solution supply hole 204 in a state where the liquid feeding is stopped.
- the sample solution is supplied to the solution supply hole 204 of the flow cell 231.
- the supplied sample solution stays at one end of the flow path 209 in a state where it is stored in the solution supply hole 204 and is in an equilibrium state without being sent.
- the sample solution stored in the solution supply hole 204 is continuously fed to the metal thin film 210 so that the sample solution is guided to the flow path 209. The In this state, the sample solution is measured.
- the first sealing member 232 seals the opening of the first through hole 205 in a state where the reference solution is stored in the solution supply hole 204. It is affixed to.
- the reference solution stored so that the solution supply hole 204 sucks outside air is flowed. 209 to the metal thin film 210. Therefore, liquid feeding can be easily performed with a simple configuration, and manufacturing costs can be reduced.
- the opening of the second through hole 206 is sealed by the second sealing member 233. Therefore, the sample solution supplied to the solution supply hole 204 is stored in the solution supply hole 204 without being fed to the flow path 209 until the second sealing member 233 is peeled off from the second through hole 206 and opened. It is assumed that That is, the second sealing member 233 is peeled off from the second through hole 206 and opened, so that the sample solution stored so that the solution supply hole 204 sucks outside air is sent to the metal thin film 210 of the flow path 209. It is like that. Therefore, the timing at which the sample solution is fed with a simple configuration can be actively controlled, and workability is improved.
- the ampoule 212 is used as the liquid sealing member of the storage unit.
- any configuration may be used as long as the reference solution can be stored in the solution supply hole 204 and the solution supply hole 204 can be opened.
- the present invention is not limited to this, and other microcapsules, sealed containers, and the like may be used.
- the second sealing member 233 described in the sixth embodiment may be used in the fourth and fifth embodiments to seal the second through hole 206 so that the second through hole 206 can be opened.
- the operator since the operator can actively control the timing of feeding the sample solution in accordance with the work, the measurement accuracy is improved and the workability is improved.
- the measurement of the reference solution and the measurement of the sample solution are performed once each.
- the present invention is not limited to this, after the measurement of the sample solution, the second reference solution is supplied to the solution supply hole 204 to perform the measurement, and the first and second measurement results of the reference solution are used to measure the sample solution.
- the measurement result may be obtained.
- the reference solution may be measured three or more times, and the measurement result of the sample solution may be obtained using these measurement results of the reference solution.
- the first through hole 205 is described as the first transfer unit and the second through hole 206 is described as the second transfer unit.
- the present invention is not limited thereto.
- the first transfer unit and the second transfer unit may be configured with, for example, a flow path or a cavity that expresses a capillary phenomenon and sucks each solution.
- the shape, quantity, and arrangement of the first through-hole 205 and the second through-hole 206 are not limited to the present embodiment, and can be variously set according to the demand and application.
- the flow cell is described as being used for the SPR measurement device 300, but the present invention can also be applied to other devices that flow and measure a sample solution. That is, for example, it can be applied in the field of handling sample solutions such as micro TAS, Lab on a chip, micro combinatorial chemistry, chemical IC, chemical sensor, biosensor, trace analysis, electrochemical analysis, chromatography, QCM measurement, ATR measurement, etc. It is.
- the flow cell according to the seventh embodiment is provided with a flow path 9a instead of the flow path 9 of the first embodiment.
- the flow path 9a of the seventh embodiment is similar to the flow path 9 (FIG. 4) of the first embodiment, from the area where the circular hole 7 is provided to the area where the through hole 5 is provided. It is formed in a straight line.
- FIG. 27 is a plan view of a region (corresponding to region Z1 in FIG. 4) where the metal thin film 10 of the flow path 9a according to the seventh embodiment of the present invention is not provided.
- the channel 9a shown in FIG. 27 has a width y1.
- FIG. 28 is a plan view of a region (corresponding to region Z2 in FIG. 4) where the metal thin film 10 of the flow path 9a according to the seventh embodiment of the present invention is provided.
- the width at both ends is y1
- the width at the center is y2.
- y2 is smaller than y1. That is, the width of the channel 9a becomes narrower from both ends toward the center.
- antibodies 91, 92, and 93 are arranged in an array. The liquid flowing in the flow path 9a passes over the antibodies 91, 92, and 93.
- the capillary force F1 in the circular tube as shown in FIG. 29 is expressed by the following formula (1).
- the cross section of this circular tube is a circle with a radius r.
- the surface tension is ⁇ and the contact angle is ⁇ .
- the capillary force F1 acting on the circular tube of FIG. 29 is inversely proportional to the radius r of the cross section of the circular tube.
- the capillary force F2 in a rectangular tube as shown in FIG. 30 is represented by the following formula
- the horizontal width of this rectangular tube is w and the height is d.
- the contact angle on the upper surface is ⁇ t
- the contact angle on the lower surface is ⁇ b
- the contact angle on the left surface is ⁇ l
- the contact angle on the right surface is ⁇ r .
- the capillary force F2 acting on the rectangular tube in FIG. 30 is inversely proportional to the lateral width w and height d of the cross section of the rectangular tube.
- the capillary force at the center is larger than both ends of the flow path 9a.
- the capillary force becomes stronger as the tube becomes thinner, it is more stable that the liquid flowing through the capillary is collected in a narrow place.
- the liquid such as the reference solution that passes through the flow path 9a in the region where the metal thin film 10 is provided has a property of being collected near the center of the flow path 9a.
- the measurement of the reference solution or the like is performed in the flow path in the region where the metal thin film 10 is provided.
- the shape of the flow path 9a in the region where the metal thin film 10 is provided has the structure shown in FIG. That is, the cross-sectional area of the flow path 9a in the region Z2 where the metal thin film 10 (detection unit) is provided (see FIG. 28) is the cross-sectional area of the flow path 9a in the region Z1 where the metal thin film 10 is not provided (see FIG. 27). Smaller than).
- region Z2 in which the metal thin film 10 is provided is narrower than the width
- the reference solution after the reference solution is flowed, even if time elapses and the reference solution gradually evaporates, the reference solution remains in the region Z2 where the metal thin film 10 is provided until the end. For this reason, it can prevent that an antibody is exposed to air
- the shape of the flow path 9 of 1st Embodiment was changed was demonstrated in 7th Embodiment, it is not limited to this.
- the shape of the cross section of the flow channel of the other embodiment may be the structure of the flow channel 9a according to the seventh embodiment.
- the shape of the channel in the region where the metal thin film 10 is provided is not limited to the shape of FIG.
- region in which the metal thin film 10 is provided should just be narrower than the width
- the same effect as that of the seventh embodiment can be obtained without using the structure of the flow path 9a of the seventh embodiment.
- the reason will be described with reference to FIG. 26 described in the sixth embodiment. That is, the cross-sectional area of the flow path 9 in the region where the metal thin film 10 is provided is smaller than both the cross-sectional area of the opening of the solution supply hole 204 and the cross-sectional area of the opening of the first through hole 205. Therefore, the liquid concentrates on the flow path 9 in the region where the metal thin film 10 is provided. Therefore, similarly to the seventh embodiment, it is possible to prevent the occurrence of injection shock and to prevent the antibody from drying.
- the plurality of openings 6 are sealed with a plurality of sealing members 12 made of adhesive tape, and the user can use the opening 6 when the flow cell 1 is used.
- the case where the sealing member 12 is removed has been described.
- FIG. 31 and 32 are schematic views showing the structure of a flow cell according to the eighth embodiment of the present invention.
- an external device 400 is used.
- the external device 400 includes pads 120a and 120b (sealing members) that can move up and down.
- the pad 120a seals the opening of the through hole 5a formed in the flow cell region R11.
- the pad 120b seals the opening of the through hole 5b formed in the region R12 different from the region R11 of the flow cell.
- the pads 120a and 120b can be moved up and down independently in a direction parallel to the depth direction of the through holes 5a and 5b of the flow cell.
- the openings of the through holes 5a and 5b formed in the regions R11 and R12 are sealed together by the pads 120a and 120b.
- the user of the flow cell gives an instruction to open the opening of the through hole 5a formed in the region R11 to the drive mechanism (not shown), whereby the pad 120a that has sealed the through hole 5a is It leaves
- the liquid supplied from the circular hole 7 passes the flow path 9 and the through hole 5a, and flows out of the flow cell from the opening of the through hole 5a.
- the present invention is not limited to this.
- the opening of the through hole 5a may be changed from the opened state to the sealed state by driving the pad 120a.
- the present invention is not limited to this.
- the sealing state and the opening state of the pad 120a may be switched.
- the predetermined condition for example, when the flow rate of the liquid flowing in the flow cell becomes equal to or less than a predetermined amount, the sealing state and the opening state of the pad 120a may be switched.
- the present invention can be applied to a flow cell and a liquid feeding method capable of adjusting the timing of feeding a sample solution and the amount of liquid feeding according to work.
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Abstract
Description
本願は、2008年5月29日に、日本に出願された特願2008-141463号と、2008年5月29日に、日本に出願された特願2008-141464号とに基づき優先権を主張し、その内容をここに援用する。
そして、このフローセルに試料溶液を供給すると、試料溶液は導入口から流路を通って毛細管ポンプへと達し、毛細管ポンプに吸引されて連続的に流路を流れる。
そのため、一般にフローセルの流路にまず参照溶液を流し当該参照溶液の測定を行って結果を求め、次いで、試料溶液を流し測定を行って結果を求めた後、参照溶液の測定結果と試料溶液の測定結果とを比較するようにしている。
また、作業に手間がかかるので、複数の試料溶液を連続して測定するという一連の測定が迅速に行えず、測定間隔が大きくなり、作業性が妨げられていた。
また、作業に手間がかからないので、複数の試料溶液を連続して測定するという一連の測定がより迅速に行え、測定間隔が削減されて、作業性が向上する。
このフローセルによれば、封止部材が例えば粘着テープ等からなり、この粘着テープを剥離して簡便に開口部を開口することができるので、作業性がよく、又開口する範囲を精度よく設定することができる。
このフローセルによれば、封止部材が棒状の例えば樹脂材料等で形成されており、その基端が開口部を塞いで封止した状態とされている。そして、封止部材の先端を傾倒すると、傾倒に伴って基端が開口部から剥離又は分離するように当該開口部を開口させる。すなわち、封止部材の先端を傾倒するのみで開口部を開口できるので、作業性がよい。
このフローセルによれば、室の内部の複数の柱状部材の間隔が、毛細管現象を発現するように構成されており、流路から試料溶液を吸い上げるので、前述のフローセルと同様の効果を奏功する。
また本発明に係るフローセルの送液方法によれば、試料溶液の送液のタイミング及び送液の量と、参照溶液の送液のタイミング及び送液の量とを作業に合わせ調整できるので、供給部で試料溶液と参照溶液とが混ざり合うことなく、かつ、流路を流れる試料溶液と参照溶液との間に空隙が形成されることもなく、簡便に各溶液を流路に送液でき作業性に優れるとともに、測定精度が向上する。
図1は本発明の第1の実施形態に係るフローセルを用いたSPR測定装置の概略構成を示す説明図である。図2はSPR測定装置で測定された検出部の反射率と反射角度との関係を説明する特性図である。図3は本発明の第1の実施形態に係るフローセルの概略構成を示す分解斜視図である。図4は本発明の第1の実施形態に係るフローセルの概略構成を示す平面図である。
また、このようにして、溶液供給孔4に接続する円孔7と貫通孔5に接続する吸引流路8とが流路9を介し互いに連通している。
まず、SPR測定装置100のプリズム103の測定面103aにマッチングオイル等を介しフローセル1を載置する。このようにフローセル1を載置した状態で、光源101から当該フローセル1の金属薄膜10に入射光を照射し、反射した反射光を受光部104で受光して屈折率の変化を測定可能な状態としておく。
そして、参照溶液の1回目及び2回目の測定結果を用いて、試料溶液の測定結果を求める。
また、作業に手間がかからないので、複数の試料溶液を連続して測定するという一連の測定がより迅速に行え、測定間隔が削減されて、作業性が向上する。
図5は本発明の第2の実施形態に係るフローセルの概略構成を示す分解斜視図である。図6は本発明の第2の実施形態に係るフローセルの概略構成を示す平面図である。図7は図6のA1-A1矢視を示す側断面図である。図8は図6のB1-B1矢視を示す側断面図である。
尚、前述の第1の実施形態と同一部材には同一の符号を付し、その説明を省略する。
また、このようにして、溶液供給孔24に接続する円孔29と室25に接続する蛇行流路28とが、流路30を介し互いに連通している。
そして、参照溶液の1回目及び2回目の測定結果を用いて、試料溶液の測定結果を求める。
ここで、さらに封止部材32e,32fを用いて、3回目及び4回目の参照溶液を金属薄膜31に流して夫々測定を行ってもよい。1回目~4回目の参照溶液の測定結果を用いて、試料溶液の測定結果を求めれば、より精度の高い測定が行える。
図9は本発明の第3の実施形態に係るフローセルの概略構成を示す平面図である。図10は図9のC1-C1矢視を示す側断面図である。
尚、前述の第1、第2の実施形態と同一部材には同一の符号を付し、その説明を省略する。
そして、参照溶液の1回目及び2回目の測定結果を用いて、試料溶液の測定結果を求める。
ここで、さらに封止部材52e,52fを用いて、3回目及び4回目の参照溶液を金属薄膜31に流して夫々測定を行ってもよい。1回目~4回目の参照溶液の測定結果を用いて、試料溶液の測定結果を求めれば、より精度の高い測定が行える。
例えば、開口部6,26及び凹部46を開口する順序は、第1~第3の実施形態に限定されるものではなく、作業者の作業性等を鑑み適宜変更して構わない。
また、開口部6,26及び凹部46の形状、数量及び配置は種々測定に合わせ適宜設定することとしてよい。
また、貫通孔5、室25,45及び柱状部材27,47の形状、数量及び配列は本実施形態に限定されるものではない。
図11は本発明の第4の実施形態に係るフローセルを用いたSPR測定装置の概略構成を示す説明図である。図12はSPR測定装置で測定された検出部の反射率と反射角度との関係を説明する特性図である。図13は本発明の第4の実施形態に係るフローセルの概略構成を示す分解斜視図である。図14は本発明の第4の実施形態に係るフローセルの概略構成を示す平面図である。図15は図14のA2-A2矢視を示す側断面図である。図16は図14のB2-B2矢視を示す側断面図である。図17は本発明の第4の実施形態に係るフローセルの参照溶液が検出部に送液される前の平衡状態を説明する側断面図である。図18は本発明の第4の実施形態に係るフローセルの参照溶液が検出部に送液された後の平衡状態を説明する側断面図である。
また、このようにして、溶液供給孔204と第1貫通孔205とが円孔207及び流路209を介し互いに連通している。また、第1貫通孔205と第2貫通孔206とが流路209及び吸引流路208を介し互いに連通している。
まず、SPR測定装置300のプリズム303の測定面303aにマッチングオイル等を介しフローセル201を載置する。このようにフローセル201を載置した状態で、光源301から当該フローセル201の金属薄膜210に入射光を照射し、反射した反射光を受光部304で受光して屈折率の変化を測定可能な状態としておく。
図19は本発明の第5の実施形態に係るフローセルの概略構成を示す分解斜視図である。図20は本発明の第5の実施形態に係るフローセルの概略構成を示す平面図である。図21は本発明の第5の実施形態に係るフローセルの参照溶液が検出部に送液される前の平衡状態を説明する側断面図である。図22は本発明の第5の実施形態に係るフローセルの参照溶液が検出部に送液された後の平衡状態を説明する側断面図である。
尚、前述の第4の実施形態と同一部材には同一の符号を付し、その説明を省略する。
図23は本発明の第6の実施形態に係るフローセルの概略構成を示す分解斜視図である。図24は本発明の第6の実施形態に係るフローセルの概略構成を示す平面図である。図25は本発明の第6の実施形態に係るフローセルの参照溶液が検出部に送液される前の平衡状態を説明する側断面図である。図26は本発明の第6の実施形態に係るフローセルの参照溶液が検出部に送液された後の平衡状態を説明する側断面図である。
尚、前述の第4、第5の実施形態と同一部材には同一の符号を付し、その説明を省略する。
例えば、第4の実施形態では貯留部の液封部材としてアンプル212を用いて説明したが、参照溶液を溶液供給孔204に貯留でき、かつ、溶液供給孔204を開封可能な構成であればよい。なお、これに限定されることはなく、それ以外のマイクロカプセルや密閉容器等を用いることとしても構わない。
また、第1貫通孔205、第2貫通孔206の形状、数量及び配列は、本実施形態に限定されるものではなく、要望・用途に合わせ種々様々に設定することが可能である。
第7の実施形態によるフローセルは、第1の実施形態の流路9の代わりに、流路9aが設けられている。第7の実施形態の流路9aは、第1の実施形態の流路9(図4)と同様に、円孔7が設けられている領域から、貫通孔5が設けられている領域まで、直線状に形成されている。
図28の流路9aの中央付近には、抗体91、92、93がアレイ状に配置されている。流路9a内を流れる液体は、抗体91、92、93上を通過する。
そのため、参照溶液を流した後、時間が経過し、徐々に参照溶液が蒸発する過程であっても、金属薄膜10が設けられている領域Z2に参照溶液が最後まで残る。このため、抗体が大気に曝露されることを防ぎ、乾燥による抗体の活性低下を避けることができる。
また、金属薄膜10が設けられている領域の流路の形状は、図28の形状に限定されるものではない。金属薄膜10が設けられている領域の流路9aの中央における幅が、両端における幅よりも狭ければよい。例えば、金属薄膜10が設けられている領域の流路9aの幅が、両端から中央に向かうに従って、直線的に狭くなるような形状を用いてもよい。
第1の実施形態では、図4に示すように、複数の開口部6を、粘着テープからなる複数の封止部材12で封止し、フローセル1の使用時に、利用者が、開口部6から封止部材12を除去する場合について説明した。
パッド120aは、フローセルの領域R11に形成されている貫通孔5aの開口部を封止する。また、パッド120bは、フローセルの領域R11とは異なる領域R12に形成されている貫通孔5bの開口部を封止する。パッド120a、120bは、外部装置400の制御に基づいて、フローセルの貫通孔5a、5bの深さ方向と平行な方向に、それぞれ独立して、上下動させることができる。
フローセルの使用者が、領域R11に形成された貫通孔5aの開口部を開口させる指示を、駆動機構(図示省略)に対して与えることにより、貫通孔5aを封止していたパッド120aが、貫通孔5aから離れる。これにより、円孔7から供給される液体が、流路9、貫通孔5aを通過し、貫通孔5aの開口部から、フローセルの外部に流出する。
4,24・・・溶液供給孔(供給部)、
5・・・貫通孔(移送部)、
6,26・・・開口部、
9,30・・・流路、
10,31・・・金属薄膜(検出部)、
12,32,52・・・封止部材、
25,45・・・室(移送部)、
27,47・・・柱状部材(移送部)、
46・・・凹部(開口部)、
201,221,231・・・フローセル、
204・・・溶液供給孔(供給部)、
205・・・第1貫通孔(第1移送部)、
206・・・第2貫通孔(第2移送部)、
209・・・流路、
210・・・金属薄膜(検出部)、
212・・・アンプル(貯留部)、
222・・・供給部封止部材(貯留部)、
232・・・第1封止部材(貯留部)、
233・・・第2封止部材
Claims (16)
- 試料溶液が流れる流路と、
前記流路に連通し前記試料溶液が供給される供給部と、
一端側が前記流路に連通し、他端側が外気に開放される複数の開口部からなり、前記流路に連通し前記供給部に供給された前記試料溶液を吸引して当該流路に導く移送部と、
前記流路の前記試料溶液に対面する検出部と、
前記開口部又は前記供給部の少なくともいずれか一方を、開封可能に封止する封止部材と、
を備えるフローセル。 - 請求項1に記載のフローセルであって、
前記封止部材は、前記開口部又は前記供給部の少なくともいずれか一方に貼着され、剥離可能とされるフローセル。 - 請求項1に記載のフローセルであって、
前記封止部材は、前記開口部を基端で塞ぐ棒状からなり、先端を傾倒して当該開口部を開口させるフローセル。 - 請求項1に記載のフローセルであって、
前記移送部は、複数の貫通孔からなるフローセル。 - 請求項1に記載のフローセルであって、
前記移送部は、一端が前記流路に連通し他端が前記開口部とされた複数の室と、前記室の内部に互いに間隙を設けて配列された複数の柱状部材とを備えるフローセル。 - 請求項1に記載のフローセルであって、
前記試料溶液に近似した性質を有し測定の比較に用いられる前記参照溶液を、前記供給部に貯留させるとともに開封可能な貯留部を備え、
前記移送部は、前記流路の他端側に連通し、前記供給部に貯留した前記参照溶液を吸引して前記流路に導く第1移送部を備え、
前記貯留部の開封によって、貯留した前記参照溶液を前記流路の前記検出部に送液するフローセル。 - 請求項6に記載のフローセルであって、
前記第1移送部に連通し、前記流路に送液された前記参照溶液を吸引するとともに、前記参照溶液に続いて前記供給部に供給される前記試料溶液を前記流路の前記検出部に送液する第2移送部が設けられるフローセル。 - 請求項6に記載のフローセルであって、
前記供給部は、当該参照溶液が前記流路に送液され、この送液が停止した平衡状態で、前記供給部に一部が残留する量の前記参照溶液を貯留するフローセル。 - 請求項6に記載のフローセルであって、
前記貯留部は、前記供給部に接続された密閉容器状の液封部材からなり、
前記液封部材が開封されることで、前記供給部に貯留した前記参照溶液を前記検出部に送液するフローセル。 - 請求項6に記載のフローセルであって、
前記貯留部は、前記供給部の開口を封止するシート状の供給部封止部材からなり、
前記供給部封止部材が開封されることで、前記供給部に貯留した前記参照溶液を前記検出部に送液するフローセル。 - 請求項6に記載のフローセルであって、
前記第1移送部は、一端を前記流路に連通し、他端を外気に開口する第1貫通孔からなり、
前記貯留部は、前記第1貫通孔の開口を封止する第1封止部材からなり、
前記第1封止部材が開封されることで、前記供給部に貯留した前記参照溶液を前記検出部に送液するフローセル。 - 請求項7に記載のフローセルであって、
前記第2移送部は、一端を前記第1移送部に連通し、他端を外気に開口する第2貫通孔からなり、
前記第2貫通孔の開口を封止する第2封止部材が設けられ、
前記第2封止部材が開封されることで、前記供給部に供給された前記試料溶液を前記検出部に送液するフローセル。 - 請求項1に記載のフローセルであって、
前記検出部が設けられている領域の前記流路の断面積は、前記検出部が設けられていない領域の前記流路の断面積よりも小さいフローセル。 - 請求項1に記載のフローセルであって、
外部装置によって前記封止部材の開封状態が制御されるフローセル。 - 供給部に、試料溶液と前記試料溶液に近似した性質を有し測定の比較に用いられる参照溶液とを夫々供給し、流路を介して前記供給部に連通する移送部が、当該供給部の試料溶液と参照溶液とを夫々吸引して前記流路に導き、前記流路に対面する検出部に送液するフローセルの送液方法であって、
前記参照溶液を前記供給部に供給し、前記移送部の複数の開口部を封止する前記封止部材のうち一部を開封することで、前記参照溶液を吸引し前記検出部に流す工程と、
前記試料溶液を前記供給部に供給し、前記封止部材のうち前記一部とは異なる部分を開封することで、当該試料溶液を吸引し前記検出部に流す工程と、
を備えるフローセルの送液方法。 - 流路の一端側に連通する供給部に、試料溶液に近似した性質を有する参照溶液と前記試料溶液とを順次供給して前記流路に導き、前記流路に対面する検出部に送液するフローセルの送液方法であって、
前記供給部に前記参照溶液を貯留させるための貯留部を開封することで、前記流路の他端側に連通する第1移送部に前記参照溶液を吸引させ前記流路の前記検出部に送液する工程と、
前記供給部に前記試料溶液を供給する工程と、
前記第1移送部に連通する第2移送部で前記流路に送液された前記参照溶液を吸引するとともに、前記供給部の前記試料溶液を前記流路の前記検出部に送液する工程と、
を備えるフローセルの送液方法。
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Also Published As
Publication number | Publication date |
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US20110070655A1 (en) | 2011-03-24 |
EP2282190A1 (en) | 2011-02-09 |
EP2282190B1 (en) | 2017-07-12 |
EP2282190A4 (en) | 2011-10-19 |
US8663560B2 (en) | 2014-03-04 |
JPWO2009145172A1 (ja) | 2011-10-13 |
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