WO2012105171A1 - 検査チップ及びこの検査チップを備えた検査チップセット - Google Patents
検査チップ及びこの検査チップを備えた検査チップセット Download PDFInfo
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- WO2012105171A1 WO2012105171A1 PCT/JP2012/000276 JP2012000276W WO2012105171A1 WO 2012105171 A1 WO2012105171 A1 WO 2012105171A1 JP 2012000276 W JP2012000276 W JP 2012000276W WO 2012105171 A1 WO2012105171 A1 WO 2012105171A1
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- sheet
- inspection
- pipette tip
- tip
- sealing member
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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
- B01L3/02—Burettes; Pipettes
- B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
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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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- 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
-
- 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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/645—Specially adapted constructive features of fluorimeters
- G01N21/648—Specially adapted constructive features of fluorimeters using evanescent coupling or surface plasmon coupling for the excitation of fluorescence
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/483—Physical analysis of biological material
- G01N33/487—Physical analysis of biological material of liquid biological material
- G01N33/48707—Physical analysis of biological material of liquid biological material by electrical means
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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
- G01N35/1079—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices with means for piercing stoppers or septums
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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
- B01L2200/02—Adapting objects or devices to another
- B01L2200/026—Fluid interfacing between devices or objects, e.g. connectors, inlet details
- B01L2200/027—Fluid interfacing between devices or objects, e.g. connectors, inlet details for microfluidic devices
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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
- B01L2200/0689—Sealing
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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
- B01L2300/04—Closures and closing means
- B01L2300/041—Connecting closures to device or container
- B01L2300/044—Connecting closures to device or container pierceable, e.g. films, membranes
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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
- B01L2300/06—Auxiliary integrated devices, integrated components
- B01L2300/0627—Sensor or part of a sensor is integrated
- B01L2300/0636—Integrated biosensor, microarrays
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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
- B01L2300/0877—Flow chambers
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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
- B01L2400/0475—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
- B01L2400/0487—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure fluid pressure, pneumatics
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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
- B01L3/02—Burettes; Pipettes
- B01L3/0275—Interchangeable or disposable dispensing tips
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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
- G01N2021/058—Flat flow cell
-
- 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
- G01N35/00029—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor provided with flat sample substrates, e.g. slides
- G01N2035/00099—Characterised by type of test elements
- G01N2035/00158—Elements containing microarrays, i.e. "biochip"
Definitions
- the present invention relates to an inspection chip in which the sealing member is perforated in a flow path whose end opening is sealed by a sealing member, and an inspection liquid is injected and sucked, and an inspection chip set including the inspection chip
- the present invention relates to a test chip used for a biochemical test, and a test chip set including the test chip.
- the test chip includes a flat chip body 110, a storage portion 112 in which a test liquid such as a reagent is stored, and the storage portion 112. And a reaction unit 114 for reacting the test liquid contained in the sample with a sample or the like.
- the accommodating part 112 is comprised by the accommodation recessed part 112a and the sheet-like sealing member 112b.
- the housing recess 112a is provided on the upper surface of the chip body 110 and is recessed downward.
- the sealing member 112b is affixed to the upper surface of the chip body 110 so as to cover the upper opening of the accommodation recess 112a in a state where the inspection liquid is accommodated in the accommodation recess 112a.
- this test chip 100 first, a sample or the like is placed in the reaction unit 114. Next, the sealing member 112b is perforated by the nozzle member 116 (see FIG. 12B), and the nozzle member 116 sucks the inspection liquid in the housing recess 112a. The aspirated test liquid is discharged by the nozzle member 116 to the reaction unit 114 where a specimen or the like is arranged. As a result, the sample and the test liquid are mixed and reacted. A test result is derived based on this reaction.
- the sealing member 112b of the test chip 100 described above prevents evaporation of the test liquid in the housing recess 112a and mixing of foreign substances into the test liquid until the test of the specimen or the like using the test chip 100 is performed. It is a member. Therefore, when the nozzle member 116 penetrates the sealing member 112b in order to suck or inject the inspection liquid in the housing recess 112a, the adhesion (sealing property) between the nozzle member 116 and the sealing member 112b is reduced. ) Is not sufficiently secured.
- the nozzle member 116 penetrating the sealing member 112b sucks or injects the test liquid in the housing recess 112a
- the nozzle member changes when the pressure in the housing recess 112a greatly fluctuates. There is a concern that liquid may leak from between 116 and the sealing member 112b.
- the sealing member As disclosed in Patent Document 2, when a nozzle member or the like penetrates, as a sealing member in consideration of adhesion between the nozzle member and the like, for sealing a straw insertion port of a paper beverage container
- the sealing member used is known.
- the sealing member includes an insertion port peripheral portion 210 of a paper beverage container straw, an inner film 212 disposed inside the insertion port peripheral portion 210, and the insertion port peripheral portion.
- the film is sandwiched by the outer film 214 disposed outside the portion 210, and in this state, portions corresponding to the straw insertion ports 211 of both films are heat-welded.
- the outer film 214 is a polymer film.
- the inner film 212 is formed by laminating and laminating an aluminum sheet 216 and a polymer film 218 with each other.
- the sealing member 200 configured in this manner, when the straw is inserted into the paper beverage container from the straw insertion port 211 by pressing the tip of the straw, the sealing member 200 penetrates the straw. Adhesiveness is secured between the outer peripheral surface of the sealing member and the periphery of the opening of the sealing member 200 (opening formed by inserting a straw). Thereby, the content (beverage) of a paper beverage container does not leak from between the outer peripheral surface of a straw and the said opening peripheral part of the sealing member 200.
- the films 214, 216, and 218 constituting the sealing member 200 are bonded to each other by heat welding, the adhesive force is weak. For this reason, when the pressure change in the paper beverage container is repeated or the insertion and removal of the straw is repeated, the films 214, 216, and 218 are peeled from the peripheral edge of the opening of the sealing member 200 by the straw. And this peeling spreads gradually. Thus, when peeling of the films 214, 216, and 218 constituting the sealing member 200 spreads, liquid leakage occurs from the peeled site.
- the sealing member 200 of the paper beverage container is used to seal the flow path, the housing recess, and the like of the inspection chip 100, the liquid for inspection by the nozzle member that penetrates the sealing member 200 is used.
- the internal pressure of the flow path fluctuates due to suction and injection, or the nozzle member is repeatedly inserted and removed from the sealing member 200 for suction and injection of the inspection liquid, the films are peeled off. Liquid leakage is likely to occur.
- a nozzle member such as a pipette
- An inspection chip according to the present invention and an inspection chip set including the inspection chip include a sealing member, and the sealing member includes a first sheet having predetermined ductility and predetermined elasticity that can be punched, and the first sheet.
- a plurality of sheets including a second sheet having a ductility lower than that of the first sheet and the adjacent sheets are bonded together, and the second sheet is located inside the first sheet in the stacking direction. positioned. Therefore, according to the present invention, in the inspection chip provided with the flow path, the inspection chip that hardly leaks when the sample solution is injected and sucked into the flow path by the nozzle member such as a pipette, and the inspection chip.
- An inspection chip set including a chip can be provided.
- FIG. 1 is a schematic diagram of an inspection system according to the present embodiment.
- FIG. 2A is a schematic longitudinal sectional view of an inspection chip used in the inspection system
- FIG. 2B is a schematic longitudinal sectional view of a prism main body in an inspection chip according to another embodiment.
- FIG. 3 is a schematic configuration diagram of the liquid feeding unit and the control unit in a state where the inspection chip of the inspection system is arranged.
- FIG. 4 is a functional block diagram of the control unit.
- FIG. 5 is a diagram illustrating a state in which the inspection liquid is accumulated at the tip of the nozzle member.
- FIG. 6 is a view for explaining a method of forming an air hole in the inspection chip.
- FIG. 1 is a schematic diagram of an inspection system according to the present embodiment.
- FIG. 2A is a schematic longitudinal sectional view of an inspection chip used in the inspection system
- FIG. 2B is a schematic longitudinal sectional view of a prism main body in an inspection chip according to another embodiment.
- FIG. 7 is a view for explaining injection and suction of the inspection liquid into the flow path of the inspection chip.
- FIG. 7A shows a state before the sealing member is perforated
- FIG. B) shows a state in which the inspection liquid is being injected into the flow path
- FIG. 7C shows a state in which the inspection liquid is being sucked from the flow path.
- FIG. 8 is a diagram for explaining the state of each sheet when the insertion opening is formed in the sealing member of the inspection chip.
- FIG. 8A is a diagram before all sheets reach the break limit.
- FIG. 8B shows a state in which the second sheet has reached the breaking limit
- FIG. 8C shows a state in which all the sheets have reached the breaking limit and an insertion opening has been formed.
- FIG. 8A is a diagram before all sheets reach the break limit.
- FIG. 8B shows a state in which the second sheet has reached the breaking limit
- FIG. 8C shows a state in which all the sheets have reached the breaking limit and an insertion opening
- FIG. 9 is a diagram for explaining the pressure and peeling moment in the flow path applied to the peripheral edge of the insertion opening.
- FIG. 10 is a schematic configuration diagram of a detection unit in the inspection apparatus of the inspection system.
- FIG. 11 is a view for explaining a sealing member according to another embodiment.
- FIG. 12 is a diagram for explaining a conventional inspection chip.
- FIG. 13 is a view for explaining a sealing member used for sealing a straw insertion port of a conventional paper beverage container.
- the test system according to the present embodiment is used for biochemical tests that detect and analyze specimens such as antigens using a plurality of test liquids.
- this inspection system includes an inspection chip 10 and an inspection device 2.
- the inspection device 2 causes a biochemical reaction in the inspection chip 10 and measures and analyzes the result.
- the inspection device 2 is capable of injecting and sucking the inspection liquid L to and from the inspection chip 10, and holding the inspection chip 10 in a predetermined position and transporting the inspection chip 10 to a predetermined position.
- a sample solution including a sample to be detected a cleaning liquid used when cleaning the flow path 22 of the test chip 10, a buffer liquid, and the like are used.
- the inspection liquid L is not limited to these.
- it may be an antibody solution, a labeled antibody solution, a reaction inhibitor solution, and other chemical solutions used in biochemical tests.
- the inspection chip 10 is used for inspection and analysis of biological materials by antigen-antibody reaction or the like.
- the inspection chip 10 of the present embodiment is a sensor chip having a so-called Kretschmann arrangement.
- This test chip 10 is an analyzer that analyzes a sample based on a change in the resonance angle of surface plasmon resonance, or a fluorescence emitted when a sample or a fluorescent substance labeled on the sample is excited by an enhanced electric field based on surface plasmon resonance. Used in analyzers that measure.
- the inspection chip 10 includes an inspection chip main body (chip main body) 11 and an end opening (flow) of a flow path (liquid storage portion) 22 provided in the inspection chip 10. And a sealing member (elastic member) 12 that seals the (road opening) 25.
- the inspection chip body 11 includes a prism part 14 having a metal film 13 and a flow path member 15 that forms a flow path 22 through which the inspection liquid L flows in cooperation with the prism part 14.
- the prism portion 14 includes a prism main body portion 16 into which the excitation light ⁇ for generating the surface plasmon is incident and a metal film 13 formed on a specific surface 17 of the prism main body portion 16. And having.
- the surface of the prism main body 16 includes an incident surface 18, a film forming surface 17, and an exit surface 19.
- the prism main body 16 is made of transparent glass or resin.
- the incident surface 18 allows the excitation light ⁇ from the excitation light source 61 of the detection unit 60 to enter the prism body 16 when the inspection chip 10 is installed in the detection unit 60 of the inspection apparatus 2 and analyzes the sample. .
- a metal film 13 that reflects the excitation light ⁇ incident on the inside of the prism main body 16 is formed.
- the emission surface 19 emits the excitation light ⁇ reflected by the metal film 13 on the film formation surface 17 to the outside of the prism main body 16.
- the prism main body part 16 of this embodiment is comprised only with the prism, it is not limited to this.
- the prism main body 16A may include a prism 161 and a substrate 162 on which the metal film 13 is provided. That is, the prism portion 14 ⁇ / b> A includes a substrate 163, a substrate portion 162 having a metal film 13 formed on the substrate 163, and a prism 161.
- the substrate 163 has the same refractive index as the prism 161, and includes the metal film 13 on the surface (one surface in the thickness direction) 163a.
- the substrate 163 is disposed on the surface of the predetermined surface 161a of the prism 161 via the matching oil 164 with the back surface (the other surface in the thickness direction) 163b facing the prism 161. Since the prism portion 14A includes the prism 161 and the substrate portion 162 including the metal film 13 as described above, when the metal film 13 needs to be replaced due to peeling, dirt, damage, or the like, the substrate portion. It is possible to continue using the prism 161 by exchanging only 162. Thereby, cost reduction can be aimed at.
- the metal film 13 is a metal thin film formed (formed) on the film formation surface 17 of the prism main body 16.
- the metal film 13 of this embodiment is a gold film.
- the metal film 13 amplifies evanescent waves generated when the excitation light ⁇ from the prism main body 16 side is totally reflected by the metal film 13 in the prism section 14.
- the metal film 13 is a thin film having a thickness of 100 nm or less so that surface plasmon resonance can be generated.
- the metal film 13 is formed on the film formation surface 17 so that the film thickness is preferably 30 to 70 nm.
- the reaction film 20 is provided on the surface of the metal film 13 (the surface opposite to the prism body 16) 13a.
- the reaction film 20 is formed by fixing on the metal film 13 a physiologically active substance 21 for capturing a specimen (specific antigen or the like) contained in a sample solution (test liquid).
- the physiologically active substance 21 of this embodiment is an antibody.
- This physiologically active substance 21 is fixed to the surface 13a of the metal film 13 by surface treatment. Specifically, the physiologically active substance 21 is fixed to a region in contact with the sample solution flowing through the flow path 22 on the surface 13 a of the metal film 13. Note that the physiologically active substance (antibody) 21 in FIG. 2A is schematically shown and is different from the actual form.
- the flow path member 15 is provided on the film formation surface 17 (specifically, on the metal film 13) of the prism main body portion 16, and forms the flow path 22 in cooperation with the prism portion 14.
- the flow path member 15 is made of a transparent resin.
- the flow path member 15 of the present embodiment is a plate-like member that expands in the horizontal direction.
- the flow path 22 has a plurality of (two in this embodiment) communication portions that communicate the reaction portion 23 in which a biochemical reaction (for example, an antigen-antibody reaction or the like) is performed and the reaction portion 23 and the outside of the test chip 10. 24.
- a biochemical reaction for example, an antigen-antibody reaction or the like
- the reaction unit 23 includes a groove provided on the back surface 15b of the flow path member 15 (the lower surface in FIG. 2A), the prism unit 14 (specifically, the metal film 13 on the prism main body unit 16), Surrounded by That is, in the reaction part 23, the sample solution flows while contacting the surface of the metal film 13 (region where the physiologically active substance 21 is fixed) 13a. As a result, the sample solution flows in contact with the physiologically active substance 21 when flowing through the flow path 22.
- the reaction is promoted and reacted in the reaction unit 23 by the test liquid L (for example, a sample solution including a sample or a chemical solution group) discharged from the nozzle member 31 of the liquid feeding unit 30. Stopping, cleaning, etc. are performed.
- the test liquid L for example, a sample solution including a sample or a chemical solution group
- the inner diameter of the reaction part 23 is smaller than the inner diameter of the communication part 24. Specifically, the inner diameter of the reaction portion 23 is large enough to cause capillary action (eg, about 30 to 200 ⁇ m).
- each communication portion 24 opens on the surface (the upper surface in FIG. 2A) 15a of the flow path member 15, and the other end (the end opposite to the one end). Is connected to the reaction unit 23.
- the pair of communication parts 24, 24 respectively extend from both ends of the reaction part 23 toward the upper surface of the inspection chip body 11 (that is, the upper surface 15 a of the flow path member 15). ) 15a opening is formed.
- the single flow path 22 is formed by the reaction part 23 and the pair of communication parts 24 and 24.
- the sealing member 12 is a sheet-like member.
- the sealing member 12 covers the flow path opening 25 on the surface of the test chip body 11 and seals the flow path 22.
- the sealing member 12 of the present embodiment covers the entire area of the upper surface 15a on the upper surface 15a of the test chip body 11.
- the sealing member is not limited to this. That is, the sealing member may be provided at least in a region where the flow path opening 25 can be sealed. If the sealing member 12 is provided at least in an area where the flow path opening 25 can be sealed, the flow path 22 is sealed.
- the sealing member 12 is a multilayer sheet in which a plurality of sheets are laminated.
- the sheets adjacent in the stacking direction are bonded together.
- the sheets adjacent in the stacking direction are bonded together with an adhesive or a pressure-sensitive adhesive.
- the sealing member 12 of this embodiment has a three-layer structure. Specifically, a first sheet (first sheet) 26, a second sheet (second sheet) 27, and a third sheet 28 are laminated in order.
- the first sheet 26 is a polymer film having predetermined ductility and predetermined elasticity (see FIGS. 2A and 3). Specifically, the 1st sheet
- the first sheet 26 has low elasticity and high ductility (for example, the elongation at break is 200 to 720% and the elastic modulus is 0.05 to 0.5 GPA).
- the first sheet 26 of the present embodiment is made of low density polyethylene (LDPE) and has a thickness of 30 to 70 ⁇ m.
- LDPE low density polyethylene
- the elongation at break is 480 to 720% and the elastic modulus is 0.19 to 0.4 GPA.
- the material of the first sheet 26 is not limited to LDPE.
- the material of the first sheet 26 may be a polymer film having high ductility and low elasticity such as linear low density polyethylene (LLDPE), ethylene vinyl acetate copolymer (EVA), and aliphatic aromatic copolyester. That's fine.
- LLDPE linear low density polyethylene
- EVA ethylene vinyl acetate copolymer
- aliphatic aromatic copolyester that's fine.
- the elongation at break is 230 to 690% and the elastic modulus is 0.17 to 0.39 GPA.
- EVA ethylene vinyl acetate copolymer
- the elastic modulus is 0.05 to 0.14 GPA.
- the second sheet 27 is formed of a material having a lower ductility than the first sheet 26 (breaking elongation is 50% or less).
- the second sheet 27 is located on the inner side (inspection chip main body 11 side) of the first sheet 26 in the sealing member 12.
- the material of the second sheet 27 in the present embodiment is aluminum (AL).
- the second sheet 27 has a thickness of 3 to 10 ⁇ m.
- the second sheet 27 made of AL has an elongation at break of 20 to 25% and an elastic modulus of 70 GPA.
- the material of the second sheet 27 is not limited to AL.
- the material of the second sheet 27 may be a metal (including an alloy) such as copper (Cu), tin (Sn), or gold (Au).
- Cu copper
- Sn tin
- Au gold
- the breaking elongation is 7 to 13% and the elastic modulus is 130 GPA.
- the breaking elongation is 20% and the elastic modulus is 50 GPA.
- the material is Au, for example, the elongation at break is 42%.
- the moisture blocking property and the light shielding property between the flow path 22 and the outside of the inspection chip 10 are sufficiently secured.
- a second sheet 27 may be further disposed outside the first sheet 26.
- the third sheet 28 is an adhesive film composed of an adhesive.
- the third sheet 28 has a thickness of 20 to 100 ⁇ m. With the third sheet 28, the sealing member 12 is firmly bonded to the inspection chip body 11.
- the sealing member 12 may be bonded to the inspection chip body 11 with a coating type adhesive instead of the third sheet (adhesive film) 28.
- This coating type adhesive is not a sheet-like or film-like adhesive such as the above-mentioned pressure-sensitive adhesive film, but a liquid or sol or gel adhesive.
- the liquid feeding unit (liquid feeding device) 30 causes a biochemical reaction to occur in the test chip 10 by injecting and sucking the test liquid L to and from the test chip 10.
- the liquid feeding unit 30 includes a nozzle member 31, a pump 32, and a nozzle driving unit 33 (see FIG. 3).
- the liquid feeding unit 30 includes a plurality of chemical liquid containers and chemical liquid chips (not shown) in which various chemical liquids (test liquids) are stored, and a waste liquid container (not shown) for discarding the used test liquid L. ) And a pipette disposal container (not shown) for discarding the used nozzle member 31.
- the nozzle member 31 has an opening 35 at the tip, and discharges (injects) and sucks the inspection liquid L from the opening 35 to the flow path 22 of the inspection chip 10.
- the nozzle member 31 of the present embodiment is a pipette tip that is detachably attached to the pump 32.
- the pipette tip 31 has a liquid storage portion 36 that extends upward from the opening 35 at the tip and can store the inspection liquid L therein.
- the pipette tip 31 is a nozzle member that is long in the vertical direction.
- a through-hole penetrating in the axial direction (vertical direction in FIG. 3) of the pipette tip 31 is provided inside the pipette tip 31.
- a portion of the through-hole on the opening 35 side of the tip of the pipette tip 31 (from the opening 35 to the tip of the pump nozzle 41 inserted into the through-hole) is a liquid reservoir 36. That is, the liquid storage part 36 of the present embodiment is a part surrounding a columnar space that communicates from the opening 35 at the tip of the pipette tip 31 to the pump nozzle 41 connected to the pipette tip 31.
- the tip portion 37 of the pipette tip 31 has a so-called tapered outer peripheral surface 37a whose outer diameter (diameter) gradually decreases toward the tip.
- the pipette tip 31 is formed of an elastic member such as polypropylene in order to improve the adhesion with the sealing member 12.
- the tip side of the pipette tip 31 has a tapered shape.
- the tapered portion is reduced in diameter toward the tip at a constant rate, that is, the inclination angle is constant. This inclination angle is 1 ° to 15 ° with respect to the axial direction of the pipette tip 31.
- a tip surface 38 surrounding the opening 35 at the tip of the pipette tip 31 is orthogonal or substantially orthogonal to the axis of the pipette tip 31.
- the pump 32 includes a pump main body 40 that sucks and discharges fluid, and a pump nozzle 41 for connecting the pipette tip 31 to the pump main body 40.
- the pump body 40 is connected to and controlled by the control unit 70.
- the pump nozzle 41 has an outer peripheral surface 41 a having a shape corresponding to the inner peripheral surface of the through hole of the pipette tip 31. For this reason, when the pump nozzle 41 is inserted into the through hole of the pipette tip 31 from the base side of the pipette tip 31, the pipette tip 31 engages with the pump nozzle 41.
- the pipette tip 31 is removed from the pump 32 by applying a force to the pipette tip 31 in the direction of separating the pipette tip 31 from the pump nozzle 41 in the axial direction of the pipette tip 31.
- the nozzle drive unit 33 raises and lowers the pipette tip 31 connected to the pump 32 by raising and lowering the pump 32.
- the nozzle drive unit 33 includes an elevating unit 45 and a horizontal direction moving unit 51.
- the elevating unit 45 raises and lowers the pipette tip 31 by holding and holding the pump 32 (reciprocating in the Z-axis direction). At this time, the pipette tip 31 moves up and down while maintaining a posture in which the tip of the pipette tip 31 faces downward (that is, the upper surface of the inspection tip 10 held by the holding and conveying unit 57).
- the lifting unit 45 includes a linear stage 46 and a Z-axis motor 50.
- the linear stage 46 engages with a feed screw 47, a guide member 48 extending in the vertical direction, and the feed screw 47 and the guide member 48, respectively, and a moving base 49 that holds the pump 32 in a predetermined range so as to be movable up and down. And comprising.
- the Z-axis motor 50 rotates the feed screw 47 of the linear stage 46 to move the moving base 49 in the Z-axis direction along the guide member 48 (that is, move up and down).
- the Z-axis motor 50 is connected to the control unit 70 and controlled by the control unit 70.
- the horizontal direction moving unit 51 moves the pump 32 in the horizontal direction (in this embodiment, the X-axis direction: the left-right direction in FIG. 3), that is, the direction orthogonal to the Z-axis direction.
- the horizontal direction moving part 51 of this embodiment moves the pump 32 and the raising / lowering part 45 with the pipette tip 31 attached together in the X-axis direction.
- the horizontal direction moving unit 51 includes a linear stage 52 and an X-axis motor 53.
- the linear stage 52 includes a feed screw 54, a guide member 55 extending in the X-axis direction, and a moving table 56 that engages with the feed screw 54 and the guide member 55 and holds the elevating unit 45.
- the X-axis motor 53 moves the moving base 56 in the X-axis direction along the guide member 55 by rotating the feed screw 54 of the linear stage 52.
- the X-axis motor 53 is connected to the control unit 70 and is controlled by the control unit 70.
- the holding and conveying unit 57 holds the inspection chip 10 inserted into the inspection apparatus 2 from a chip insertion port (not shown) or the like and conveys it to a predetermined position of the liquid feeding unit 30, and holds the inspection chip 10 at this position.
- the holding and conveying unit 57 conveys the test chip 10 to a predetermined position of the detection unit 60 and holds it at this position.
- the biochemical reaction in the flow path 22 in the present embodiment is capturing of a specimen or the like by the physiologically active substance 21, or labeling of a fluorescent substance on the captured specimen.
- the holding and conveying unit 57 holds the inspection chip 10 in the liquid feeding unit 30 such that the flow path member 15 is positioned on the upper side and the prism unit 14 is positioned on the lower side (posture shown in FIG. 3). At this time, the holding and conveying unit 57 holds the inspection chip 10 so that the two flow path openings 25 on the upper surface 15a of the inspection chip main body 11 are located under the orbit of the pipette tip 31 in the X-axis direction. Further, the holding and conveying unit 57 holds the inspection chip 10 in the detection unit 60 so that the flow path member 15 is located on the upper side and the prism part 14 is located on the lower side. At this time, the holding and conveying unit 57 holds the test chip 10 at a position where the excitation light ⁇ emitted from the excitation light source 61 can enter the prism unit 14 from the incident surface 18 of the prism unit 14.
- the detection unit 60 includes an excitation light source 61 that irradiates excitation light ⁇ , and an excitation fluorescence measurement unit (measurement optical system) 62 that measures excitation fluorescence.
- the excitation light source 61 causes the excitation light ⁇ to enter the prism portion 14 of the inspection chip 10 from the incident surface 18 and reflect it by the metal film 13. Thereby, plasmon resonance occurs in the metal film 13.
- the excitation light source 61 is configured so that the excitation light ⁇ is incident on the metal film 13 from the back side of the region of the metal film 13 where the physiologically active substance 21 is fixed (the region corresponding to the reaction portion 23 of the flow path 22).
- the excitation light ⁇ is emitted.
- the enhanced electric field caused by the plasmon resonance generated in the metal film 13 causes the specimen captured by the physiologically active substance 21 or the fluorescent substance labeled on the specimen to emit light.
- the excitation fluorescence measurement unit 62 is positioned above the inspection chip 10 held by the holding and conveying unit 57 in the detection unit 60 (see FIGS. 1 and 10).
- the excitation fluorescence measurement unit 62 measures the amount of excitation fluorescence excited by the enhanced electric field, and outputs the measurement result to the control unit 70.
- the chemical container, the waste liquid container, and the pipette disposal container are containers whose upper ends are open or openable so that the pipette tip 31 can be inserted from above.
- the chemical solution container, the waste solution container, and the pipette disposal container are respectively arranged under the orbit in the X-axis direction of the pipette tip 31.
- the control unit 70 is a circuit that controls each unit of the inspection apparatus 2 according to the function.
- the control unit 70 includes various control programs such as a control program for controlling each unit of the inspection apparatus 2 according to the function and a calculation program for detecting and analyzing a sample based on an output from the excitation fluorescence measurement unit 62.
- a ROM Read Only Memory
- EEPROM Electrically Erasable Programmable Read Only Memory
- CPU Central Processing Unit
- the control unit 70 functionally includes a liquid feeding control unit 71, a transport control unit 72, and an inspection control unit 73.
- the liquid feeding control unit 71 includes a nozzle position control unit 74 and a pump control unit 75, and controls each part of the liquid feeding unit 30.
- the nozzle position control unit 74 controls the position of the pipette tip 31. Specifically, the nozzle position control unit 74 controls the relative position of the pipette tip 31 with respect to the test tip 10 held by the holding / conveying unit 57. The nozzle position control unit 74 controls the horizontal movement unit 51 to control the position of the pipette tip 31 in the X-axis direction, and controls the elevating unit 45 to control the pipette tip 31. And a Z-axis direction control unit 77 for controlling the position in the Z-axis direction.
- the X-axis direction control unit 76 controls the X-axis motor 53 of the horizontal direction moving unit 51 to move the moving table 56 along the guide member 55 in the X-axis direction. Specifically, the X-axis direction control unit 76 controls the X-axis motor 53 so that each chemical solution container (not shown), the waste liquid container (not shown), and the pipette disposal container (not shown) above each opening. The pipette tip 31 is moved to the position and the position above each flow path opening 25 on the upper surface 15a of the inspection tip body 11.
- the Z-axis direction control unit 77 controls the Z-axis motor 50 of the elevating unit 45 to move the moving base 49 along the guide member 48 in the Z-axis direction. Thereby, the pipette tip 31 moves up and down. Specifically, the Z-axis direction control unit 77 has a height at which the pipette tip 31 does not interfere with the inspection tip 10, the chemical solution container, the waste solution container, and the pipette disposal container when the pipette tip 31 moves in the X-axis direction. Pipette tip 31 is raised to the position (retracted position).
- the Z-axis direction control unit 77 moves the pipette tip 31 along the X-axis direction to a position above the opening of the chemical liquid container, the waste liquid container or the like or a position above the flow path opening 25 of the inspection chip body 11.
- the pipette tip 31 is lowered.
- the Z-axis direction control unit 77 lowers the pipette tip 31 to a predetermined height position when the pipette tip 31 moves to the position above the opening of the chemical solution container along the X-axis direction.
- the tip of the pipette tip 31 is inserted into an inspection liquid (sample solution, cleaning liquid, buffer liquid, etc.) stored in the chemical container.
- the pump control unit 75 controls the pump 32 to suck the inspection liquid L into the pipette tip 31
- the Z-axis direction control unit 77 raises the pipette tip 31 to the retracted position.
- the Z-axis direction control unit 77 lowers the pipette tip 31 when the pipette tip 31 moves to a position above the opening of the waste liquid container along the X-axis direction.
- the Z-axis direction control unit 77 stops the lowering of the pipette tip 31 when the tip end side of the pipette tip 31 is inserted into the waste liquid container. Then, after the pump control unit 75 controls the pump 32 to discharge the inspection liquid L in the pipette tip 31 to the waste liquid container, the Z-axis direction control unit 77 raises the pipette tip 31 to the retracted position.
- the Z-axis direction control unit 77 lowers the pipette tip 31 when the pipette tip 31 moves to the position above the opening of the pipette disposal container along the X-axis direction.
- the Z-axis direction control unit 77 stops the lowering of the pipette tip 31 when the pipette tip 31 is inserted into the pipette disposal container.
- the Z-axis direction control unit 77 removes the pipette tip 31 from the pump 32 using a pipette attachment / detachment device (not shown), and discards the pipette tip 31. Thereafter, the Z-axis direction control unit 77 raises the pipette tip 31 to the retracted position, and attaches a new pipette tip 31 to the pump 32 by the pipette attachment / detachment device.
- the Z-axis direction control unit 77 is used to inject and suck the inspection liquid L into the flow path 22 of the inspection chip 10 or to pierce the air holes 29A in the sealing member 12.
- the pipette tip 31 is lowered to a predetermined position.
- the tip 37 of the pipette tip 31 is inserted into the channel 22 through the channel opening 25.
- the tip of the pipette tip 31 is pressed to perforate the sealing member 12.
- the tip 37 of the pipette tip 31 is inserted into the flow path 22.
- the tip portion 37 of the pipette tip 31 is inserted into the flow path 22 through the formed opening (insertion opening 29). Then, after the pump control unit 75 controls the pump 32 to discharge and suck the test liquid L by the pipette tip 31, the Z-axis direction control unit 77 raises the pipette tip 31 to the retracted position.
- the pump controller 75 operates the pump 32 when the nozzle position controller 74 moves the pipette tip 31 to a predetermined position or while moving the pipette tip 31 to a predetermined position. Specifically, the pump control unit 75 operates the pump 32 as follows.
- the pump control portion 75 seals the tip surface 38 of the pipette tip 31.
- the pump 32 is driven, and the inspection liquid L in the liquid reservoir 36 is sucked into the pump 32.
- the inspection liquid L slowly rises in the liquid reservoir 36.
- the pump control unit 75 stops the pump 32, and stops the suction of the inspection liquid L in the liquid storage unit 36 by the pump 32.
- the inspection liquid L is Since the inside of the liquid storage portion 36 is raised, the pipette tip 31 is in the meantime (that is, while the tip of the pipette tip 31 passes through the insertion opening peripheral portion (cylindrical portion) 290 of the sealing member 12 in the vertical direction). It is possible to prevent the inspection liquid L from accumulating like a ridge at the tip of the head (see FIG. 5).
- the pump control unit 75 raises the test liquid L in the liquid storage unit 36 at a speed at which the test liquid L does not enter the pump 32 while the tip of the pipette tip 31 passes through the sealing member 12. . Further, the pump control unit 75 determines the timing of starting and stopping the suction of the inspection liquid L in the pipette tip 31 based on the position of the pipette tip in the Z-axis direction. The position of the pipette tip 31 in the Z-axis direction may be obtained based on the amount of descent from the retracted position of the pipette tip 31. Further, the position in the Z-axis direction may be obtained from the measurement result of the tip position of the pipette tip 31 by a position sensor or the like.
- the pump control unit 75 When the distal end surface 38 of the 31 approaches the insertion opening peripheral edge portion 290 of the sealing member 12, the pump 32 is driven to cause the pump 32 to suck the inspection liquid L in the liquid storage portion 36. As a result, the inspection liquid L slowly rises in the liquid reservoir 36.
- the pump control unit 75 When the pipette tip 31 is pulled out from the insertion opening 29 of the sealing member 12 and the tip end surface 38 of the pipette tip 31 is raised to a position above the surface of the sealing member 12, the pump control unit 75 And the suction of the inspection liquid L in the liquid reservoir 36 by the pump 32 is stopped.
- the inspection liquid L rises in the liquid reservoir 36. Therefore, during this period (that is, while the tip of the pipette tip 31 passes through the insertion opening peripheral edge 290 of the sealing member 12 in the vertical direction), the liquid for inspection L is like a spear at the tip of the pipette tip 31. Can be prevented (see FIG. 5).
- the pump control unit 75 does not allow the inspection liquid L to enter the pump 32 while the tip of the pipette tip 31 passes through the sealing member 12.
- the inspection liquid L is raised in the liquid reservoir 36.
- the pump control unit 75 starts the suction of the inspection liquid L in the pipette tip 31 based on the position of the pipette tip 31 in the Z-axis direction even when the pipette tip 31 is lowered, as in the case where the pipette tip 31 is lowered. And determine when to stop.
- the inspection liquid L rises in the liquid reservoir 36 when the tip of the pipette tip 31 passes through the insertion opening peripheral edge 290 of the sealing member 12 when the pipette tip 31 moves up and down. By doing so, it is possible to effectively prevent the inspection liquid L from being accumulated like a spear at the tip of the pipette tip 31 during this period. As a result, when the pipette tip 31 is moved up and down, the inspection liquid L stored in the pipette tip 31 is reliably prevented from adhering to the insertion opening peripheral portion 290 (sealing member 12).
- the pump control unit 75 appropriately drives the pump 32 when the distal end portion 37 of the pipette tip 31 is inserted into the flow channel 22 through the insertion opening 29, so that the inspection liquid into the flow channel 22 is obtained.
- the injection of L, the suction of the inspection liquid L from the flow path 22, the injection and the suction of the inspection liquid L into the flow path 22 are repeated. Accordingly, the pump control unit 75 mixes the test liquids L or promotes a biochemical reaction.
- the pump control unit 75 drives the pump 32 when the tip 37 of the pipette tip 31 is inserted into the waste liquid container to check the inspection liquid L in the liquid storage unit 36 (specifically, a used inspection). Liquid L or the like) is discharged from the pipette tip 31. Thereby, the inspection liquid L is discarded in the waste liquid container.
- the conveyance control unit 72 controls the holding conveyance unit 57. Specifically, when the inspection chip 10 is installed in the holding conveyance unit 57, the conveyance control unit 72 causes the holding conveyance unit 57 to convey the inspection chip 10 to a predetermined position of the liquid feeding unit 30. When the inspection chip 10 is transferred to the predetermined position, the transfer control unit 72 causes the holding transfer unit 57 to hold the inspection chip 10 at the position. Then, when the process in the liquid feeding unit 30 is completed, the conveyance control unit 72 causes the holding conveyance unit 57 to convey the detection unit 60 to a predetermined position.
- the holding and conveying unit 57 conveys the inspection chip 10 while maintaining the posture of the inspection chip 10 in the liquid feeding unit 30 (the posture in which the flow path member 15 is on the upper side and the prism portion 14 is on the lower side).
- the conveyance control unit 72 causes the holding conveyance unit 57 to hold the inspection chip 10 at the position.
- the inspection control unit 73 controls each unit of the detection unit 60 and processes the measurement result of the excitation fluorescence. Specifically, when the inspection chip 10 is transported to the detection unit 60, the inspection control unit 73 causes the excitation light source 61 to irradiate the excitation light ⁇ toward the inspection chip 10. In addition, the inspection control unit 73 causes plasmon resonance to occur in the vicinity of the metal film 13 of the inspection chip 10 by irradiation with the excitation light ⁇ , and the excitation fluorescence measurement unit 62 determines the amount of excitation fluorescence generated by the enhanced electric field caused by the plasmon resonance. Let me measure. The examination control unit 73 analyzes the sample based on the output (measurement result) from the excitation fluorescence measurement unit 62. Then, the inspection control unit 73 outputs the analysis result to the outside of the inspection apparatus 2 (for example, a display device such as a monitor or a printer) or a storage unit (not shown) of the inspection apparatus 2.
- the inspection control unit 73 outputs the analysis
- biochemical inspection is performed as follows.
- the control unit 70 moves the inspection chip 10 to the predetermined position of the liquid feeding unit 30 by the holding and conveying unit 57. At this time, the two flow path openings 25, 25 of the test chip 10 are both covered with the sealing member 12. For this reason, the inside of the flow path 22 is in a sealed state (see FIG. 2A).
- the control unit 70 causes the nozzle position control unit 74 to lower the pipette chip 31.
- the control unit 70 allows the tip portion 37 of the pipette tip 31 to penetrate at the site of the sealing member 12 that seals the one channel opening 25.
- a hole (air hole) 29A that communicates the inside of the flow path 22 and the outside of the inspection chip 10 is formed (see FIG. 6).
- the inspection liquid L can be easily injected from the other flow path opening 25.
- the control unit 70 (specifically, the nozzle position control unit 74 and the pump control unit 75) is a test liquid L (a sample solution containing a sample or the like in this embodiment) that is necessary for the biochemical sequence in the test apparatus 2 from the chemical solution container. ) In a pipette tip 31 (that is, a predetermined amount of sample solution is sucked into the liquid reservoir 36). Then, the nozzle position control unit 74 moves the pipette tip 31 to a position above the other channel opening 25 (the channel opening 25 on the side sealed by the sealing member 12) (see FIG. 7A). ).
- the nozzle position control unit 74 lowers the pipette tip 31 in a state where the sample solution is stored in the liquid storage unit 36, and seals the flow path opening 25 by the tip portion 37 of the pipette tip 31.
- the sealing member 12 is drilled.
- the pump control unit 75 activates the pump 32 to connect the pump 32 to the liquid storage unit 36. Aspirate the sample solution. As a result, the sample solution slowly rises in the liquid reservoir 36 (see arrow A in FIG. 7A).
- the nozzle position controller 74 further lowers the pipette tip 31 to bring the tip end surface 38 into contact with the sealing member 12.
- the portion of the sealing member 12 covering the other channel opening 25 is pushed by the tip surface 38 of the pipette tip 31 and begins to gradually extend (FIG. 8). (See (A)). At this time, the sample solution does not come into contact with the sealing member 12 because the sample solution is slowly rising in the liquid reservoir 36.
- the second sheet 27 having low ductility in the sealing member 12 reaches the extension limit, and the position 138 corresponding to the corner portion 38c at the tip of the pipette tip 31 where the force from the pipette tip 31 is concentrated. Fracture starts from (see FIG. 8B). Further, when the nozzle position controller 74 lowers the pipette tip 31, the tip end portion 37 of the pipette tip 31 is pushed into the flow path 22. Thereby, in the sealing member 12, the region of the first sheet 26 corresponding to the broken region of the second sheet 27 extends so as to be in close contact with the outer peripheral surface 37 a of the tip portion 37 of the pipette tip 31.
- a cylindrical portion (insertion opening peripheral edge portion) 290 along the outer peripheral surface 37 a of the distal end portion 37 is formed.
- the first sheet 26 also extends and reaches the limit and breaks (see FIG. 8C). Thereby, the insertion opening 29 is formed in the sealing member 12.
- the pump control unit 75 stops the suction of the sample solution in the liquid storage unit 36 by the pump 32.
- the sample solution inspection liquid L
- FIGS. 8A to 8C See FIGS. 8A to 8C. That is, when the tip of the pipette tip 31 passes through the insertion opening 29, the sample solution is located above the opening 35 at the tip in the liquid reservoir 36, and the pipette tip 31 is passed during the passage.
- the sample solution is prevented from accumulating like a ridge at the tip of the plate.
- the nozzle position control portion 74 stops the lowering of the pipette tip 31.
- a cylindrical portion (insertion opening peripheral portion) 290 that is in close contact with the tip portion 37 (outer peripheral surface 37a) of the pipette tip 31 is formed. Therefore, sufficient adhesion is ensured between the pipette tip 31 and the sealing member 12.
- the pump controller 75 causes the pump 32 to discharge the sample solution in the pipette tip 31 into the flow path 22 (see FIG. 7B).
- the pump control unit 75 first performs slow liquid feeding.
- the pump control unit 75 increases the flow rate of the sample solution flowing through the reaction unit 23, whereby the physiologically active substance 21 and the sample are collected.
- the biochemical reaction with the specimen or the like contained in the solution is promoted.
- the control unit 70 (pump control unit 75) increases the flow rate to about 10,000 to 20000 uL / min.
- the inner diameter of the reaction portion 23 (height from the metal film surface 13a in FIG. 2A) is about 30 to 200 ⁇ m.
- the flow path resistance when the sample solution flows through the reaction unit 23 is large, and thereby the pressure in the flow path 22 becomes higher by about +0.1 MPA in relative pressure than the atmospheric pressure (0.1 MPA).
- the flow path resistance is defined by the shape of the flow path 22, the length of the flow path 22, the liquid feeding speed, the viscosity of the inspection liquid L, and the like.
- the reaction rate of the biochemical reaction in the reaction unit 23 depends on the shape of the flow path 22 and the velocity (flow velocity) of the test liquid L.
- the inner diameter of the reaction portion 23 (the surface of the metal film on which the reaction film 20 is formed) so that the test liquid L flows only in the vicinity of the reaction film 20 formed on the metal film 13. It is preferable to increase the reaction rate of the biochemical reaction by reducing the height from 13a and increasing the flow rate of the test liquid L in the reaction section 23. For this reason, the channel resistance of the sample solution flowing through the reaction unit 23 increases, and as a result, the pressure in the channel 22 (specifically, the pressure in the vicinity of the insertion opening 29 in which the tip 37 of the pipette tip 31 is inserted). ) Becomes higher.
- the pump control unit 75 controls the pump 32 to repeat the injection and suction of the sample solution into the flow path 22 a predetermined number of times. Thereafter, the pump control unit 75 causes the pump 32 to suck all the sample solution in the flow path 22 into the pipette tip 31 (see FIG. 7C). This suction is performed slowly so that no liquid remains in the flow path 22.
- the pressure in the flow path 22 decreases, but the insertion opening peripheral edge 290 and the pipette tip 31 are in close contact with each other. Air or the like can be prevented from entering the flow path. Thereby, the sample solution is efficiently sucked by the pipette tip 31.
- the nozzle position controller 74 raises the pipette tip 31 and pulls the tip of the pipette tip 31 out of the channel 22 (insertion opening 29). At this time, when the tip of the pipette tip 31 inserted into the flow path 22 approaches the lower end of the insertion opening peripheral portion (cylindrical portion) 290 of the sealing member 12, the pump controller 75 causes the pump 32 to pipette.
- the sample solution in the chip 31 is aspirated and the sample solution is slowly raised in the liquid reservoir 36.
- the pump control unit 75 stops the suction of the sample solution by the pump 32. .
- the tip of the pipette tip 31 passes through the insertion opening 29 when the pipette tip 31 is raised, the sample solution is rising in the liquid storage portion 36 in the pipette tip 31, and the insertion opening During passage of 29, the sample solution is prevented from accumulating like a spear at the tip of the pipette tip 31.
- the pump control unit 75 causes the pump 32 to discharge the used sample solution from the pipette tip 31 into the waste liquid container.
- the nozzle position control unit 74 and the pump control unit 75 inject the other inspection liquid (cleaning liquid in the present embodiment) sucked from the chemical solution storage unit (not shown) by the pipette tip 31 into the flow path 22 and The inside of the flow path 22 is washed by repeating the suction. Thereafter, the nozzle position control unit 74 and the pump control unit 75 suck all the cleaning liquid used for the cleaning from the flow path 22 and discard it in a waste liquid container (not shown).
- the above liquid feeding process (reaction and washing in the reaction unit 23) is repeated a predetermined number of times. In this repetition, injection of the same test liquid L (a sample solution containing a specimen or the like in the present embodiment) may be performed, and other test liquids (for example, the physiologically active substance 21 constituting the reaction film 20 may be added). Injection and aspiration of a solution containing a fluorescent substance that labels the captured specimen or the like may be performed.
- test liquid L a sample solution containing a specimen or the like in the present embodiment
- other test liquids for example, the physiologically active substance 21 constituting the reaction film 20 may be added.
- Injection and aspiration of a solution containing a fluorescent substance that labels the captured specimen or the like may be performed.
- the insertion and withdrawal of the tip 37 of the pipette tip 31 from the insertion opening 29 formed in the sealing member 12 is repeated.
- the insertion opening peripheral edge portion 290 first sheet 26
- the insertion opening peripheral edge 290 and the outer peripheral surface 37a of the tip 37 of the pipette tip 31 are each inserted. Adhesion is ensured.
- the nozzle position control unit 74 and the pump control unit 75 pass the buffer liquid (other test liquid) sucked from the chemical liquid container (not shown) by the pipette tip 31 through the insertion opening 29.
- the liquid is injected into the flow path 22 from the tip 37 inserted into the flow path 22.
- the nozzle position control unit 74 raises the pipette tip 31 in a state where the buffer solution is injected into the flow path 22 and pulls the tip portion 37 out of the insertion opening 29.
- suction by the pump 32 is not performed when the tip of the pipette tip 31 passes through the insertion opening 29. Since the step of injecting the inspection liquid L into the flow path 22 is not performed after the step of injecting the buffer solution, the contamination due to the mixing of the inspection liquids L adhering to the insertion opening peripheral portion 290 does not occur. Because.
- the nozzle position controller 74 moves the pipette tip 31 to a pipette disposal container (not shown).
- a pipette attachment / detachment device removes the pipette tip 31 from the pump 32, and thereby the used pipette tip 31 is discarded into the pipette disposal container.
- the Z-axis direction control unit 77 raises the pipette tip 31 to the retracted position, and attaches a new pipette tip 31 to the pump 32 by the pipette attachment / detachment device.
- the holding and conveying unit 57 conveys the inspection chip 10 from the liquid feeding unit 30 to the detecting unit 60.
- the inspection control unit 73 irradiates the excitation light source 61 with the excitation light ⁇ from the excitation light source 61 toward the inspection chip 10.
- the excitation light source 61 irradiates the inspection chip 10 with the excitation light ⁇ so that the excitation light ⁇ is incident on the metal film 13 at an incident angle at which plasmon resonance occurs in the metal film 13 (see FIG. 10). ).
- the enhanced electric field formed by this plasmon resonance excites the fluorescent substance labeled on the specimen (antigen) or the like captured by the physiologically active substance 21. Thereby, the fluorescent substance emits fluorescence (excitation fluorescence).
- the inspection control unit 73 causes the excitation fluorescence measurement unit 62 to measure the amount of excitation fluorescence, and derives the amount of excitation fluorescence per unit area, for example, based on the measurement result.
- the control unit 70 outputs the derived result to the outside (for example, a display device such as a monitor or a printing device such as a printer), a storage unit (not shown) or the like of the inspection device 2, and ends the measurement.
- the adjacent sheets 26 and 27 are bonded to each other with an adhesive or a pressure-sensitive adhesive, so that the respective sheets 26 and 27 are compared with the case where the adjacent sheets are bonded only by thermal welding. 27 are firmly bonded to each other. For this reason, even if the pressure fluctuation in the flow path 22 and the insertion / extraction of the pipette tip 31 are repeated, peeling between the sheets 26 and 27 constituting the sealing member 12 hardly occurs.
- the pipette tip 31 is pierced into the sealing member 12 and the insertion opening peripheral portion (cylindrical portion) 290. Is formed, the first sheet 26 having elasticity comes into contact with the outer peripheral surface 37 a of the pipette tip 31. For this reason, the insertion opening peripheral part 290 and the outer peripheral surface 37a of the pipette tip 31 are more closely attached, and the adhesiveness between these is further improved.
- the pipette tip 31 is sealed.
- an insertion opening peripheral portion (cylindrical portion) 290 is suitably formed.
- seat 27 is formed with aluminum, the interruption
- the inner diameter of the intermediate part (reaction part 23) is smaller than the inner diameter of the end part (communication part 24).
- the flow rate of the sample solution L is increased in the reaction unit 23 and the channel resistance is increased.
- the pressure around the opening 25 in 22 is higher than atmospheric pressure.
- the inspection liquid (for example, sample solution) L stored in the pipette tip is inserted into the inspection tip 10. Adhesion to the peripheral edge 290 of the opening 29 is prevented. This is because when the pipette tip 31 is moved up and down, when the tip of the pipette tip 31 passes through the insertion opening 29, the inspection liquid L rises in the liquid storage portion 36 of the pipette tip 31, so that the pipette during this time This is because the inspection liquid L is prevented from accumulating like a ridge at the tip of the chip 31.
- the inside of the flow path 22 is sealed (sealed) until the inspection is performed by the inspection system 1 (that is, until the insertion opening 29 is formed in the sealing member 12). become. For this reason, evaporation of the liquid etc. accommodated in this flow path 22 and mixing of other substances into the said liquid are prevented reliably.
- the pipette tip 31 is detachably attached to the pump 32. For this reason, the dirty pipette tip 31 after being used a predetermined number of times or in a predetermined step can be easily replaced with a clean pipette tip 31. This makes it easy to maintain the accuracy of the inspection. Further, if an inexpensive pipette tip 31 such as a general-purpose product is used, an increase in cost can be suppressed even if the pipette tip 31 is replaced frequently.
- inspection chip and the inspection chip set of the present invention are not limited to the above-described embodiments, and it is needless to say that various changes can be made without departing from the gist of the present invention.
- the nozzle member of the above embodiment is the pipette tip 31 that is detachably attached to the pump 32 or the like, but is not limited thereto.
- the nozzle member may be fixed to a pump or the like. That is, it is not necessary to be a disposable nozzle member as in the present embodiment.
- the specific configuration of the sealing member provided in the inspection chip 10 is not limited.
- a first sheet 26 having a predetermined ductility and a predetermined elasticity, a second sheet 27 having a smaller ductility than the first sheet 26, and a third sheet that is an adhesive layer are sequentially arranged.
- the sealing member may include a first sheet and a second sheet, and may be a sheet-like member having two layers or four or more layers as long as the layers adjacent to each other in the vertical direction are bonded to each other. Specifically, as illustrated in FIG.
- a first sheet 26, a second sheet 27, a first sheet 26, and a third sheet 28 may be stacked in order. Even in such a sealing member 12 ⁇ / b> A, when the insertion opening 29 is formed by the nozzle member, the second sheet 27 starts to break based on the difference in ductility of each layer. When the insertion opening 29 is formed, the uppermost first sheet 26 forms a cylindrical portion (insertion opening peripheral portion) 290 having predetermined elasticity.
- seat 26 is arrange
- another sheet may be disposed outside the first sheet 26.
- the test chip according to the present embodiment is a test chip in which a biochemical test is performed by injection and suction of a test liquid using a nozzle member, and includes a flow path having a plurality of ends, and each end of the flow path Includes a chip body that opens on the surface thereof, and a sheet-like sealing member that covers at least the plurality of openings on the surface of the chip body and seals the inside of the flow path.
- seat which has the predetermined
- a plurality of sheets including a plurality of sheets, and sheets adjacent to each other in the stacking direction of the plurality of sheets are bonded to each other, and the second sheet is more than the first sheet in the stacking direction. Located on the inside which is the side.
- the sealing member since the sealing member includes the first sheet and the second sheet having different ductility, when the nozzle member is pressed from the front end side, the second sheet having low ductility extends first. The limit is reached. As a result, the second sheet starts to break from a position corresponding to the corner of the nozzle tip where the force from the nozzle member concentrates (see FIGS. 8A and 8B). When the nozzle member is further pushed in, a region of the first sheet corresponding to a region where the second sheet is broken extends so as to be in close contact with the peripheral surface of the nozzle member, thereby forming a cylindrical portion. Thereafter, the first sheet also reaches the limit and breaks (see FIG. 8C). By forming such a cylindrical portion that is in close contact with the peripheral surface of the nozzle member, sufficient adhesion is ensured between the nozzle member and the sealing member.
- this cylindrical portion provides sufficient resistance even when the pressure in the flow path increases. Specifically, since the pressure in the flow path is applied in a direction orthogonal to the surface surrounding the flow path, when the pressure in the flow path becomes high, if the cylindrical portion is not present, the sealing member Pressure is applied to the peripheral edge of the opening so as to widen the opening, and the peripheral edge of the opening tends to extend, thereby easily causing liquid leakage (see FIG. 9A). However, when the cylindrical part is formed, a force is applied to the part in a direction in which it is pressed against the peripheral surface of the nozzle member, so that the nozzle member and the cylindrical part are in close contact with each other and liquid leakage is unlikely to occur ( (See FIG. 9B).
- the first sheet is located on the outermost side. According to this configuration, when the nozzle is pierced by the sealing member to form the cylindrical portion, the first sheet having elasticity comes into contact with the outer peripheral surface of the nozzle member. For this reason, the said cylindrical part and the outer peripheral surface of a nozzle member adhere more closely, and the sealing performance between these improves more.
- the nozzle member pierces the sealing member.
- the cylindrical part is suitably formed.
- the second sheet is formed of aluminum, so that the moisture blocking property and the light shielding property between the inside of the channel and the outside of the channel are sufficiently ensured.
- the sealing member may include a third sheet having a predetermined adhesive force, and the third sheet may be disposed at a position closest to the chip body in the stacking direction of the plurality of sheets.
- the sealing member can be easily bonded to the chip body. That is, the sealing member can be bonded to the chip body by the adhesive force of the third sheet without applying an application type (liquid, sol or gel) adhesive to the sealing member or the chip body.
- the inspection chip set according to the present embodiment includes any one of the above inspection chips and a pipette chip for injecting and sucking the inspection liquid into the flow path.
- the tip portion of the pipette tip has a nozzle shape with an opening at the tip, and the tip surface surrounding the opening when the pipette tip is pressed against the sealing member of the inspection tip from the tip side is the seal. It has a shape that is parallel or substantially parallel to the stop member.
- the cylindrical portion is surely formed. That is, when the sealing member is perforated with a pipette tip having a tip surface parallel or substantially parallel to the sealing member, each sheet constituting the sealing member is stretched by being pushed by the tip surface.
- the site is suitably formed.
- the inspection chip according to the present invention and the inspection chip set including the inspection chip have the sealing member perforated in the flow path in which the end opening is sealed by the sealing member, and the inspection liquid. Is useful for a test chip that is injected and sucked, and is suitable for making it difficult for liquid leakage when a sample solution is injected and sucked into a flow path by a nozzle member such as a pipette.
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Abstract
Description
検査チップ10がチップ挿入口(図示省略)等から検査装置2に挿入されると、制御部70は、保持搬送部57によって検査チップ10を送液部30の前記所定位置に移動させる。このとき、検査チップ10の二つの流路開口25,25は、いずれも封止部材12によって覆われている。このため、流路22内は、密閉状態となっている(図2(A)参照)。検査チップ10が送液部30の所定位置に配置されると、制御部70は、ノズル位置制御部74によってピペットチップ31を降下させる。そして、制御部70は、ピペットチップ31の先端部37を、一方の流路開口25を封止している封止部材12の部位において貫通させる。これにより、封止部材12において、流路22内と検査チップ10の外部とを連通する穴(空気穴)29Aが形成される(図6参照)。この空気穴29Aが形成されることにより、他方の流路開口25から検査用液体Lが注入しやすくなる。
制御部70(詳しくは、ノズル位置制御部74とポンプ制御部75と)は、薬液容器から当該検査装置2における生化学シーケンスに必要な検査用液体L(本実施形態では検体等を含む試料溶液)をピペットチップ31に定量(即ち、所定の量の試料溶液を液体貯留部36内に吸引)する。そして、ノズル位置制御部74は、ピペットチップ31を他方の流路開口25(封止部材12によって封止されている側の流路開口25)の上方位置に移動させる(図7(A)参照)。次に、ノズル位置制御部74は、液体貯留部36内に試料溶液が貯留された状態のピペットチップ31を降下させ、当該ピペットチップ31の先端部37によって流路開口25を封止している封止部材12を穿孔する。
次に、保持搬送部57は、検査チップ10を送液部30から検出部60に搬送する。検査チップ10が検出部60に搬送され、保持搬送部57によって所定位置で保持されると、検査制御部73は、励起光源61から検査チップ10に向けて当該励起光源61に励起光αを照射させる。これにより、検査チップ10の入射面18からプリズム部14内に入射した励起光αは、金属膜13における反応膜20の設けられた(生理活性物質21が固定された)部位の裏側において全反射する。このとき、金属膜13においてプラズモン共鳴が生じるような入射角で励起光αが金属膜13へ入射するように、励起光源61は、検査チップ10に対して励起光αを照射する(図10参照)。このプラズモン共鳴によって形成された増強電場は、生理活性物質21に捕捉された検体(抗原)等に標識された蛍光物質を励起させる。これにより、蛍光物質が蛍光(励起蛍光)を発する。検査制御部73は、励起蛍光測定部62にこの励起蛍光の光量を測定させ、この測定結果に基づいて、例えば、単位面積あたりの励起蛍光の光量等を導出する。そして、制御部70は、導出した結果を外部(例えば、モニター等の表示装置やプリンター等の印字装置)や当該検査装置2の記憶手段(図示省略)等に出力して測定を終了する。
以上の実施形態をまとめると、以下の通りである。
Claims (7)
- ノズル部材による検査用液体の注入及び吸引によって生化学検査が行われる検査チップであって、
複数の端部を有する流路を備え、前記流路の各端部がその表面でそれぞれ開口するチップ本体と、
前記チップ本体の表面において少なくとも前記複数の開口を覆って前記流路内を密閉状態にするシート状の封止部材と、を備え、
前記封止部材では、前記ノズル部材を先端側から押し当てることにより穿孔可能な所定の延性及び所定の弾性を有する第1のシートと、前記第1のシートよりも延性の低い第2のシートと、を含む複数のシートが積層されると共に前記複数のシートの積層方向において互いに隣接するシート同士が貼り合わされ、
前記積層方向において前記第2のシートが前記第1のシートよりも前記チップ本体側である内側に位置していることを特徴とする検査チップ。 - 前記封止部材において、前記第1のシートが最も外側に位置することを特徴とする請求項1に記載の検査チップ。
- 前記第1のシートの破断伸び率は、200%以上720%以下であり、
前記第2のシートの破断伸び率は、50%以下であることを特徴とする請求項1又は2に記載の検査チップ。 - 前記第2のシートは、アルミニウムにより形成されることを特徴とする請求項1乃至3のいずれか1項に記載の検査チップ。
- 前記封止部材は、所定の粘着力を有する第3のシートを含み、前記第3のシートは、前記複数のシートの積層方向における最もチップ本体側の位置に配置されることを特徴とする請求項1乃至4のいずれか1項に記載の検査チップ。
- 前記流路において、前記端部間の部位の内径が前記端部の内径よりも小さいことを特徴とする請求項1乃至5のいずれか1項に記載の検査チップ。
- 請求項1乃至6のいずれか1項に記載の検査チップと、
前記流路内に検査用液体を注入及び吸引するためのピペットチップと、を備え、
前記ピペットチップの先端部は、先端が開口するノズル形状を有すると共に、前記ピペットチップを先端側から前記検査チップの封止部材に押し当てるときに前記開口の周囲を囲う先端面が当該封止部材と平行若しくは略平行となる形状を有することを特徴とする検査チップセット。
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EP12742431.5A EP2672273B1 (en) | 2011-01-31 | 2012-01-18 | Inspection chip, and inspection chip set provided with the inspection chip |
US13/982,666 US9364826B2 (en) | 2011-01-31 | 2012-01-18 | Test chip and test chip unit incorporated with test chip |
JP2012555722A JP5853961B2 (ja) | 2011-01-31 | 2012-01-18 | 検査チップを備えた検査チップセット |
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JPWO2017086199A1 (ja) * | 2015-11-16 | 2018-08-30 | コニカミノルタ株式会社 | 検査キット、検査キットを使用した送液方法及び検査装置 |
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EP2672273A1 (en) | 2013-12-11 |
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US9364826B2 (en) | 2016-06-14 |
US20130312546A1 (en) | 2013-11-28 |
JPWO2012105171A1 (ja) | 2014-07-03 |
EP2672273B1 (en) | 2018-08-15 |
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