WO2013099648A1 - 試料分析装置及び試料分析方法 - Google Patents
試料分析装置及び試料分析方法 Download PDFInfo
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- WO2013099648A1 WO2013099648A1 PCT/JP2012/082443 JP2012082443W WO2013099648A1 WO 2013099648 A1 WO2013099648 A1 WO 2013099648A1 JP 2012082443 W JP2012082443 W JP 2012082443W WO 2013099648 A1 WO2013099648 A1 WO 2013099648A1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/74—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables of fluids
- G01N27/745—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables of fluids for detecting magnetic beads used in biochemical assays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/28—Magnetic plugs and dipsticks
- B03C1/288—Magnetic plugs and dipsticks disposed at the outer circumference of a recipient
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- 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
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/551—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals the carrier being inorganic
- G01N33/553—Metal or metal coated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/18—Magnetic separation whereby the particles are suspended in a liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C2201/00—Details of magnetic or electrostatic separation
- B03C2201/26—Details of magnetic or electrostatic separation for use in medical or biological applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2446/00—Magnetic particle immunoreagent carriers
Definitions
- the present invention relates to a sample analyzer and sample analysis method for analyzing a sample, and more particularly to a sample analyzer and sample analysis method using reaction of an antigen and an antibody.
- an immunoassay will be described as a typical example of sample analysis.
- An immunological test is to detect or measure an antibody or an antigen in body fluid (plasma, serum, urine, etc.) using a specific reaction between an antigen and an antibody to diagnose a disease diagnosis or a pathological condition, etc. .
- ELISA Enzyme-Linked Immunosorbent Assay
- an antibody (first antibody) against the antigen to be measured is immobilized on the bottom of a container, and a sample such as plasma, serum, urine or the like is placed there, and the first antibody contains the antigen in the sample.
- an antibody (second antibody) bound to a labeling reagent is further bound to an antigen bound to a first antibody, and a signal emitted from the label is detected to measure the presence or absence or amount of the antigen in the sample.
- a label for example, a fluorescent substance or the like is used.
- the coloring reaction becomes strong in proportion to the number of the second antibody bound to the label, that is, the amount of the antigen, and the luminescence in the fluorescent substance is detected by a photomultiplier or the like to quantify the antigen in the sample. be able to.
- the immunoassay apparatus using the ELISA method magnetic particles are used as the solid phase, and the first antibody is immobilized on the surface of the magnetic particles.
- a substance (luminescent labeling substance) to which a fluorescent dye is bound as a label is attached to the second antibody.
- a detection substance (antigen) derived from a living body and a magnetic particle on which the first antibody is immobilized are mixed to cause an antigen-antibody reaction, the antigen contained in the sample is bound to the magnetic particle via the first antibody.
- the luminescent labeling substance is bound to the magnetic particles via the second antibody, the antigen and the first antibody.
- the amount of luminescent labeling substance increases or decreases depending on the amount of detection substance contained in the sample, that is, the amount of antigen.
- the magnetic particles to which the detection substance is bound are adsorbed to a specific place, and a laser or the like is caused to act to cause the luminescent labeling substance bound to the magnetic particles to emit light.
- a laser or the like is caused to act to cause the luminescent labeling substance bound to the magnetic particles to emit light.
- Patent Documents 1 to 4 disclose methods for adsorbing magnetic particles at predetermined positions in an analyzer.
- JP-A-8-62224 Japanese Patent Application Laid-Open No. 11-242033 Unexamined-Japanese-Patent No. 7-248330 Japanese Patent Publication No. 2003-502670
- the channel at a predetermined position for adsorbing the magnetic particles has a uniform circular shape. It is a shape or a rectangular shape uniform to the flow direction.
- the width of the magnet is smaller than the above-mentioned flow path width, and the problem is that the adsorption distribution of the magnetic particles becomes uneven.
- the width of the magnet is 5 mm and the width of the flow path and the width of the magnet are the same with respect to the flow path width of 5 mm. Therefore, it has been a problem that the adsorption distribution of the magnetic particles is lowered and the light emission intensity is lowered in the flow path side wall portion.
- the present invention provides a sample analyzer comprising a detection flow path and a magnetic field generating means for adsorbing magnetic particles to which a specific substance of a sample liquid is bound, wherein the magnetic particles in the detection flow path
- the sample analyzer is characterized in that the detection flow path is provided such that the magnet width is larger than the flow path width at the predetermined position to be adsorbed.
- the adsorption of the magnetic particles is improved in the vicinity of the side wall of the flow passage, whereby the capture ratio of the magnetic particles can be improved, the measurement accuracy can be improved, and the measurement results can be improved.
- the detection flow path of the conventional sample analyzer is shown in FIG.
- the end face having magnetic poles (A and B) is perpendicular to the flow direction in the detection channel, and the end face having no magnetic poles (C and D) in the flow direction in the detection channel They are arranged parallel to each other.
- the surface to which the magnetic particles are adsorbed is a surface, and the surface held by the slide mechanism is a surface.
- the flow channel width of the detection flow channel at a predetermined position for adsorbing the magnetic particles, and the width of the magnet or electromagnet as the magnetic field generating means for adsorbing the magnetic particles When the magnetic width is smaller than the channel width, magnetic particles could not be adsorbed in the vicinity of the channel side wall.
- the width of the magnet or electromagnet as the magnetic field generating means for adsorbing magnetic particles should be larger than the channel width. Because magnetic particles in the vicinity of the flow path can be adsorbed, the magnetic particles that have flowed out without being captured have a higher percentage of attractive force by the magnet, and the total number of captured magnetic particles increases, and the capture rate It can be improved.
- magnetic particles can be adsorbed uniformly in the measurement area, so improvement of B / F separation, improvement of washing efficiency, improvement of measurement accuracy, improvement of reproducibility of measurement results, etc. It can be expected.
- the top view and sectional drawing of a detection channel and magnet shape in the present invention The top view and sectional drawing of the conventional detection channel and magnet shape.
- Schematic of an immune analyzer The enlarged view of a detection channel. Distribution of the force to which the magnetic particles are subjected in the measurement region according to the invention and the prior art.
- Analysis flow chart for analyzing the behavior of magnetic particles Comparison of adsorption distribution in the measurement area of the present invention and the prior art. Relationship between the ratio of magnet width and channel width and the uniformity of adsorption distribution. Comparison of the amount of luminescence in the proposed shape and the conventional shape by measurement. Overall configuration of analyzer
- an immunoassay apparatus which is an example of a sample analyzer which is one of the embodiments.
- the present invention is applicable not only to immunoassays, but also to any sample analyzer that captures magnetic particles by switching magnetic field strength using magnetic particles, and is applicable to analyzers for DNA, biochemistry, etc. Is a technology that can be used as well.
- FIG. 3 shows a schematic block diagram of the immune analyzer.
- the detection flow path 10 is connected to the nozzle 27 and the pump 28 through the tube 24 and the tube 25.
- the nozzle 27 is movably attached by an arm 29, and a suspension container 30, a buffer solution container 31, and a washing solution container 32 are installed in the movement range.
- the valve 33 is provided in the tube 25 between the detection flow path 10 and the pump 28.
- the pump 28 is controlled by the controller 38 through the signal line 39a to enable accurate suction and discharge of the liquid volume. Further, it continues through the tube 26 to the waste solution 35.
- the detection flow path window 18 of the detection unit and the detection flow path base 20 are formed of a transparent material, and a detection flow path through which the solution flows is formed inside. Since the whole is formed of a transparent material, it is possible to transmit light and observe the flow state inside.
- the flow path wall is not formed of a transparent material, and a transparent material may be used as a window only at a portion through which light passes.
- the transparent flow path wall of the detection unit is made of a material substantially transparent to the wavelength of light emitted by the labeling substance of the magnetic particle complex adsorbed at the position of the measurement area in the flow cell,
- a material substantially transparent to the wavelength of light emitted by the labeling substance of the magnetic particle complex adsorbed at the position of the measurement area in the flow cell For example, it is preferable to be made of glass, quartz, plastic or the like.
- a laser light source 16 and a condenser lens 17 are installed around the lower portion of the detection flow path base 20.
- the laser irradiated from the laser light source 16 is condensed by the condenser lens 17 and can be irradiated to the measurement area 15 in the detection flow path 10.
- a magnet 21 is used as a magnetic field application means used as an adsorption means for magnetic particles.
- the magnetic pole surfaces (a and b) of the magnet are perpendicular to the flow direction, and the front side of FIG.
- the magnet 21 is installed on a slide mechanism 22 which can freely move in the horizontal direction, and when the magnetic particles are adsorbed, the magnet 21 is moved immediately below the flow path.
- the inside of the detection channel 10 is cleaned, it can be moved to a position where the influence of the magnet 21 can be sufficiently reduced, so that the cleaning can be performed sufficiently.
- the magnet 21 is moved in the horizontal direction by using the slide mechanism 22, the magnet 21 may be moved in the vertical direction as long as the influence of the magnetic field by the magnet 21 can be sufficiently reduced when cleaning.
- the controller 38 is connected to the arm 29, the light detector 40, the slide mechanism 22, the laser light source 16, the pump 28, and the valves 33 and 34, and can be controlled.
- the magnetic particles 14 are spread planarly in the detection flow path 10 which expands gently, and are attracted to the measurement area 15 by the magnetic force of the magnet 21.
- the measurement area can also be referred to as a supplementary area.
- the magnetic force of the magnet 21 is released.
- the magnetic particles 14 remain in the detection flow channel 10 in a state of being adsorbed to the measurement area 15.
- the application of the magnetic field to the detection flow channel 10 is released, and the laser is emitted from the laser light source 16 installed at the lower part of the detection flow channel 10 while keeping the magnetic particles 14 in the measurement area 15. Produces fluorescence.
- luminescence from the solid phase can be measured with high sensitivity.
- the detection channel 10 is formed of a light transmitting material, it is made of any one material selected from those having high light transmittance such as acrylic.
- the light detector 40 may be, for example, a photomultiplier.
- the detection channel 10 is formed so as to have a width 2 to 20 times the depth (that is, the thickness), and it is easy for the particles introduced on the fluid flow to spread in the lateral direction of the flow Make it Ideally, it is desirable that the magnetic particles spread as a single layer with respect to the detection flow channel 10, but in reality, the influence of the magnetic field causes some overlapping of the particles to form multiple layers. Sometimes.
- the adsorption distribution of particles in the detection flow channel 10 is based on the balance between the magnetic force from the magnetic field from the magnet 21 arranged below the detection flow channel 10 and the drag force from the flow when the suspension containing the reaction mixture is introduced. It is decided.
- the magnetic field in the detection channel 10 is preferably about 0.1 to 0.5T.
- the flow velocity of the liquid at that time is preferably about 0.05 to 0.10 m / s. If the force due to the flow velocity exceeds the force to capture the particles due to the magnetic force, the particles are detached, so it is necessary to select an appropriate flow velocity.
- the magnetic particles 14 are preferably particles as shown below. (1) particles exhibiting paramagnetic, superparamagnetic, ferromagnetic or ferrimagnetic properties (2) particles exhibiting paramagnetic, superparamagnetic, ferromagnetic or ferrimagnetic properties, synthetic polymer compounds (polystyrene, nylon etc.), natural Particles encapsulated in materials such as polymers (cellulose, agarose, etc.), inorganic compounds (silica, glass, etc.)
- the particle diameter of the magnetic particles 14 is preferably in the range of 0.01 ⁇ m to 200 ⁇ m, and more preferably in the range of 1 ⁇ m to 10 ⁇ m.
- the specific gravity is preferably in the range of 1.3 to 1.5.
- the magnetic particles 14 do not easily settle in the liquid and easily suspend. On the surface of the magnetic particle, a substance having a property of specifically binding an analyte, for example, an antibody having a property of specifically binding to an antigen is bound.
- the labeling substance is preferably a labeling substance as shown below.
- the labeling substance is specifically bound to the analyte by an appropriate means, and light is emitted by an appropriate means.
- Labeled substance used in fluorescence immunoassay For example, an antibody labeled with fluorescein isothiocyanate.
- Labeled substance used in chemiluminescence immunoassay For example, an antibody labeled with an acridinium ester.
- Labeled substances used in chemiluminescent enzyme immunoassay For example, an antibody labeled with a chemiluminescent enzyme using luminol or adamantyl derivative as a luminescent substrate.
- the sample to be analyzed is a biological fluid-derived sample such as serum or urine.
- the components to be analyzed are, for example, various tumor markers, antibodies, or antigen-antibody complexes, single proteins.
- the specific component is TSH (thyroid hormone).
- a sample to be analyzed is mixed with a bead solution, a first reagent, a second reagent, and a buffer solution, and reacted at a constant temperature (37 ° C.) for a predetermined time Is housed.
- the bead solution is a solution in which magnetic particles 14 in which particulate magnetic substances are embedded in a matrix such as polystyrene is dispersed in a buffer solution, and streptavidin capable of binding to biotin is bound to the surface of the matrix.
- the cleaning solution container 32 contains a cleaning solution for cleaning the inside of the detection flow path 10 and the tube 24.
- One cycle of analysis consists of a suspension suction period, a particle capture period, a detection period, a washing period, a reset period, and a preliminary suction period.
- One cycle starts when the suspension container 30 containing the suspension processed in the reaction unit 37 is set at a predetermined position.
- the slide mechanism 22 is operated by the signal of the controller 38, and the magnet 21 moves to the lower part of the detection flow path 10.
- the valve 33 is opened and the valve 34 is set in the closed state.
- the arm 29 operates in response to the signal of the controller 38 and inserts the nozzle 27 into the suspension container 30.
- the pump 28 performs a fixed amount of suction operation.
- the suspension in the suspension container 30 enters the tube 24 via the nozzle 27.
- the pump 28 is stopped and the arm 29 is operated to insert the nozzle 27 into the cleaning mechanism 36.
- the tip of the nozzle is cleaned.
- the pump 28 sucks at a constant speed by a signal from the controller 38. Meanwhile, the suspension present in the tube 24 passes through the detection channel 10. Since the magnetic field from the magnet 21 is generated in the detection flow path 10, the magnetic particles 14 contained in the suspension are attracted toward the magnet 21 and captured on the surface of the measurement area 15.
- the slide mechanism 22 operates to move the magnet 21 away from the detection flow channel 10. Subsequently, a laser is emitted from the laser light source 16 in response to a signal from the controller 38, and the laser is emitted to the measurement area 15 through the condenser lens 17. At that time, light is emitted from the fluorescent dye bound to the magnetic particles 14 in the measurement area 15. The wavelength is selected by the fluorescence filter and is detected by the light detector 40 such as a CCD camera or a photo multiplexer. The intensity of the emitted light is detected by the light detector 40 and sent to the controller 38 as a signal. After a certain time, stop the laser. During the detection period, the arm 29 is operated to insert the nozzle 27 into the cleaning mechanism 36.
- the cleaning fluid sucked from the cleaning fluid container 32 is allowed to pass into the detection flow channel 10 by sucking the pump 28.
- the magnetic field is distant, the magnetic particles 14 are not held on the measurement area 15 and are flushed away with the buffer solution.
- the valve 33 is closed, the valve 34 is opened, and the pump 28 is discharged.
- the liquid in the pump 28 is discharged to a waste container 35.
- the buffer solution is aspirated to fill the buffer solution in the flow path of the tube 24 and the detection flow path 10.
- the next cycle can be performed.
- FIG. 1 shows the relative positions of the detection channel 11 and the magnet 21 which are considered to be the best in the present embodiment.
- the relative position of the conventional detection flow path 11 and the magnet 21 is shown in FIG. 1 and 2, in the magnet, the end face having magnetic poles (a face and bottom face) is made perpendicular to the flow direction in the detection channel, and the end faces having no magnetic pole (face and face) are detected It is disposed parallel to the flow direction in the flow path.
- the surface to which the magnetic particles are adsorbed is a surface, and the surface held by the slide mechanism is a surface.
- the width b of the magnet 21 shown in FIG. 1 is larger than the flow path width a.
- FIG. 5 (a) shows the case where the ratio a / b of the magnet width a to the flow path width b is 0.93 (the magnet width is smaller than the flow path width)
- FIG. 5 (b) shows a / b In the case of 1.11 (the magnet width is large compared to the channel width), the force that the magnetic particles on the capture region receive from the magnet, which is calculated from the magnetic field obtained from general purpose magnetic field analysis software and the magnetic moment of the magnetic particles Is shown.
- the contour diagram of the vertical component shows the force adsorbed to the magnetic particle in the direction perpendicular to the magnetic particle
- the vector diagram of the horizontal component for the magnetic particle.
- the drawing shows the force applied in the horizontal direction on the surface), and also shows the positions of the flow path and the magnet simultaneously in order to clarify the relative position of the flow path width and the magnet width.
- the upper half side is shown in all the figures because they are vertically symmetrical.
- a force in the horizontal direction is a flow path in the vicinity of the flow path side wall where the half face or two face of the magnet exists. It was found from the contour diagram of the normal force that it is directed to the center and the vertical force that adsorbs the magnetic particles to the surface is small. It was also found that in the vicinity of the flow path wall, the force in the horizontal direction with respect to the magnetic particles was directed to the center of the flow path. From these facts, in the vicinity of the flow path wall, the magnetic particles are more strongly subjected to horizontal force toward the center of the flow path than in the vertical direction, and magnetic particles are not easily adsorbed in the vicinity of the flow path wall. It is known that it is likely to be accumulated in multiple layers near the center of the
- a flow chart of behavior analysis is shown in FIG.
- general-purpose magnetic field analysis software is used to analyze the magnetic field generated by the magnet.
- we analyze the force acting on the magnetic particles specifically, the force received from the flow, the force due to the pressure gradient of the flow, the buoyancy acting on the particles, and the force received from the magnet.
- the behavior of magnetic particles can be analyzed by solving the equation of motion of each particle in minute time intervals using these forces acting on each magnetic particle as an external force.
- FIGS. 7A and 7B show the results of analysis of the magnetic particle adsorption distribution when the ratio a / b of the magnet width a to the flow channel width b is 1.11 and 0.93. .
- the magnet width By making the magnet width larger than the channel width, it can be seen that the adsorption amount of magnetic particles in the vicinity of the channel wall is increased. This is because, as shown in FIG. 5, by making the magnet width larger than the channel width, the horizontal force acting on the magnetic particles is reduced in the vicinity of the channel wall.
- FIG. 7 (b) the magnetic particles adsorbed to the entire channel width are uniform.
- the best mode of the magnet width is that the magnet width is larger than the channel width in the entire area. It should be noted that if the magnet width is larger than the flow channel width even in part, the amount of adsorption of the magnetic particles will increase in that region, so it is easily expected that the light emission intensity will increase.
- the shape of the surface of the magnet may be trapezoidal, and may be designed to be partially larger than the flow passage side wall in the supplementary region.
- FIG. 8 shows the results of examining the uniformity of the adsorption distribution when the channel width is fixed and the magnet width is gradually increased using a magnetic particle behavior analysis program.
- the horizontal axis of the graph represents the ratio of the magnet width to the channel width, and indicates that the larger the value, the larger the magnet width with respect to the channel width.
- the vertical axis is the reciprocal of the uniformity of the adsorption distribution, and the smaller the value, the more uniformly the magnetic particles are captured.
- the ratio a / b of the magnet width a to the flow path width b is increased, the uniformity of the adsorption distribution in the measurement region is improved. This effect is effective if the magnet width is at least larger than the channel width, and it is understood that the ratio a / b of the magnet width to the channel width is about 1.67. It can be seen that if the magnet width is increased by a ratio higher than this, the uniformity of the adsorption distribution is conversely deteriorated. From this, it can be understood that the magnet width has an appropriate value.
- the amount of adsorption of magnetic particles increases in the vicinity of the side wall of the flow channel when the flow channel width a is 5.4 mm and the magnet width b is 6.0 mm.
- the inclination near the end of the magnet has no significant effect on the magnitude.
- the magnet width b is greater than or equal to 0.6 mm with respect to the flow path width a, it is effective.
- the uniformity was improved by making the width of the magnet larger than the width of the flow path, so the magnet was made as a trial and tested using an actual device.
- FIG. 9 shows the results of measuring the light emission intensity when a / b is 0.93 and 1.11. It can be seen that the light emission amount is improved by 23% by making the magnet width larger than the flow channel width. From these results, by making the magnet width larger than the flow channel width, the magnetic particles can be uniformly adsorbed to the magnet, whereby the light emission amount can be improved. In addition, since the adsorption distribution is uniformed, it is possible to improve the separation performance of B / F separation, improve the washing efficiency, improve the measurement accuracy, and improve the reproducibility of the measurement results.
- the concept of the magnet width is the same even when the flow channel width changes in the flow direction. That is, if the magnet width (the distance between the face and the face) is larger than the channel width in all the regions with respect to the channel width of the measurement region, it can be adsorbed to the vicinity of the channel wall. Can be made uniform. In addition, if the magnet width can be increased not in all regions but only in some regions, the effect is limited, but the expectation of improving the uniformity can be obtained.
- the magnet length (the distance between the surface and the surface) is larger than the measurement area, the adsorption distribution of the magnetic particles is broadened. That is, since the magnetic particles are adsorbed outside the region where the magnetic particles are desired to be adsorbed, it is easily expected that the emission intensity is reduced. Therefore, the magnet length needs to be smaller than the measurement area.
- FIG. 1 An example of this embodiment for an immunoautomatic analyzer is illustrated by FIG. 1
- control unit 119 of the analysis device 100 creates an analysis plan, and controls the operation of each mechanism described below based on this plan.
- the rack 101 of the analyzer 100 is provided with a sample container 102 for holding a sample, and is moved to a sample dispensing position in the vicinity of the sample dispensing nozzle 103 by the rack transfer line 117.
- a plurality of reaction containers 105 can be installed, and the reaction containers 105 installed in the circumferential direction are arranged in the reaction container installation position, reagent discharge position, sample discharge position, detection position, reaction container disposal position, A rotational movement is possible to move to a predetermined position, such as
- the sample dispensing tip and reaction container transfer mechanism 106 is movable in three directions of the X axis, Y axis, and Z axis, and the sample dispensing tip and reaction container holding member 107, reaction container stirring mechanism 108, sample dispensing tip
- the sample dispensing tip and the reaction container are transported by moving the ranges of the reaction container disposal hole 109, the sample dispensing tip mounting position 110, and the predetermined position of the incubator disk 104.
- a plurality of unused reaction containers and sample dispensing tips are installed in the sample dispensing tip and reaction container holding member 107.
- the sample dispensing tip and reaction container transfer mechanism 106 moves above the sample dispensing tip and reaction container holding member 107, descends, holds the unused reaction container and ascends, and the reaction container of the incubator disk 104 is placed Move to the top of the position and descend to install the reaction vessel.
- the reagent disc 111 is provided with a plurality of reagent containers 118 holding reagents and diluents.
- a reagent disc cover 112 is provided on the top of the reagent disc 111, and the inside of the reagent disc 111 is maintained at a predetermined temperature.
- a reagent disc cover opening 113 is provided in part of the reagent disc cover 112.
- the reagent dispensing nozzle 114 is capable of rotating and moving up and down, is rotationally moved above the opening 113 of the reagent disc cover 112 and descends, and the tip of the reagent dispensing nozzle 114 is diluted or diluted with a reagent in a predetermined reagent container.
- the liquid is brought into contact with the liquid, and a predetermined amount of reagent or diluent is aspirated. Then, the reagent dispensing nozzle 114 is raised to move to a position above the reagent discharge position of the incubator disk 104, and the reagent or the dilution liquid is discharged to the reaction container 105.
- the sample dispensing tip and reaction container transfer mechanism 106 moves above the sample dispensing tip and reaction container holding member 107, descends, grips the unused sample dispensing tip and rises, and the sample dispensing It moves above the tip mounting position 110 and descends to install the sample dispensing tip.
- the sample dispensing nozzle 103 is capable of rotating and moving up and down, moves above the sample dispensing tip mounting position 110 and descends, and mounts the sample dispensing tip on the tip of the sample dispensing nozzle 103.
- the sample dispensing nozzle 103 mounted with the sample dispensing tip moves above the sample container 102 placed on the transport rack 101 and descends, and sucks a predetermined amount of the sample held in the sample container 102.
- the sample dispensing nozzle 103 which has aspirated the sample moves to the sample discharge position of the incubator disk 104 and descends, and discharges the sample to the reaction container 105 on which the reagent is dispensed on the incubator disk 104. After sample ejection, the sample dispensing nozzle 103 moves above the sample dispensing tip and the reaction container disposal hole 109, and discards the used sample dispensing tip to the disposal hole.
- the sample and the reaction container 105 from which the reagent is discharged are moved to the reaction container transfer position by the rotation of the incubator disk 104, and are transferred to the reaction container stirring mechanism 108 by the sample dispensing tip and reaction container transfer mechanism 106. .
- the reaction container stirring mechanism 108 imparts rotational motion to the reaction container to mix the sample in the reaction container with the reagent.
- the reaction container after the stirring is returned to the reaction container transfer position of the incubator disk 104 by the sample dispensing tip and reaction container transfer mechanism 106.
- the reaction solution suction nozzle 115 can rotate and move up and down, the sample and the reagent are dispensed and mixed, move to the upper side of the reaction vessel 105 on the incubator disc 104 for which a predetermined time has elapsed, and descend, and the reaction vessel 105 Aspirate the reaction solution inside.
- the reaction liquid sucked by the reaction liquid suction nozzle 115 is sent to the detection unit 116, and the measurement object is detected.
- the control unit 119 derives and displays the measurement result based on the detection value of the measurement object.
- the reaction container 105 from which the reaction liquid has been aspirated is moved to the reaction container disposal position by the rotation of the incubator disk 104, and the sample dispensing tip and reaction container transport mechanism 106 transfers the sample dispensing tip and reaction container disposal hole from the incubator disc 105. It moves above 109 and is discarded from the waste hole.
- the magnetic particles can be captured uniformly, and the analysis accuracy as the immunoautomatic analyzer can be improved, and the reproducibility can be improved.
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Abstract
Description
(2)化学発光免疫測定法で使用される標識物質。例えば、アクリジニウムエステルで標識した抗体など。
(3)化学発光酵素免疫測定法で使用される標識物質。例えば、ルミノールやアダマンチル誘導体を発光基質とする化学発光酵素で標識した抗体など。
12 検出流路入口
13 検出流路出口
14 磁性粒子
15 測定領域
16 レーザー光源
17 集光レンズ
18 検出流路窓
19 検出流路壁
20 検出流路ベース
21 磁石
22 スライド機構
24、25、26 チューブ
27 ノズル
28 ポンプ
29 アーム
30 懸濁液容器
31 緩衝液容器
32 洗浄液容器
33、34 バルブ
35 廃液容器
36 洗浄機構
37 反応ユニット
38 コントローラ
39 信号線
40 光検出器
100 分析装置
101 ラック
102 サンプル容器
103 サンプル分注ノズル
104 インキュベータディスク
105 反応容器
106 サンプル分注チップおよび反応容器撹拌搬送機構
107 サンプル分注チップおよび反応容器保持部材
108 反応容器撹拌機構
109 サンプル分注チップおよび反応容器廃棄孔
110 サンプル分注チップ装着位置
111 試薬ディスク
112 試薬ディスクカバー開口部
114 試薬分注ノズル
115 反応液吸引ノズル
116 検出ユニット
117 ラック搬送ライン
118 試薬容器
119 制御部
Claims (14)
- 特定物質及びこれに結合した磁性粒子を含む試料液を捕捉領域に導入する検出流路と、
当該検出流路に試料液を供給する供給手段と、
前記検出流路内に導入された磁性粒子を、前記捕捉領域で捕捉するよう、前記検出流路の外側であって前記補足領域に近接した位置に位置づけられる磁界発生手段と、
前記捕捉領域にて捕捉された特定物質を測定する測定手段と、
測定が終了した磁性粒子を当該検出流路から排出する排出手段と、を備えた試料分析装置において、
前記磁界発生手段は、前記補足領域に対向する面において、前記検出流路の流れ方向と垂直方向の幅が当該補足領域の幅よりも、少なくとも1カ所で大きいことを特徴とする試料分析装置。
- 請求項1記載の試料分析装置において、
前記磁界発生手段は、前記補足領域に対向する面において、前記検出流路の流れ方向と垂直方向の幅が前記補足領域の幅よりすべての領域で大きいことを特徴する試料分析装置。
- 請求項1記載の試料分析装置において、
前記磁界発生手段は、前記補足領域に対向する面において、前記検出流路の流れ方向と平行方向の長さが、前記捕捉領域の長さより少なくとも1カ所でも小さいことを特徴する試料分析装置。
- 請求項3記載の試料分析装置において、
前記磁界発生手段は、前記補足領域に対向する面において、前記検出流路の流れ方向と平行方向の長さが、前記捕捉領域の長さより全ての領域で小さいことを特徴する試料分析装置。
- 請求項1または2に記載の試料分析装置において、
前記補足領域において、前記検出流路の流れ方向と垂直方向における前記磁界発生手段の幅をa、捕捉領域の幅をbとした場合、これらの比a/bが1.0より大きく1.7以下の範囲であることを特徴とする試料分析装置。
- 請求項5記載の試料分析装置において、
aがbよりも0.6mm以上大きいことを特徴とする試料分析装置。
- 請求項1~6のいずれか記載の試料分析装置において、
前記検出流路は、前記供給手段で試料液を導入する入口と、測定が終了した試料液を前記排出手段で排出する出口を有し、
前記磁界発生手段の磁極を有する面は、前記入口から出口へと向かう試料の流れ方向に対して平行となる向きに設置されていることを特徴とする試料分析装置。
- 請求項1~6のいずれか記載の試料分析装置において、
前記検出流路は、前記供給手段で試料液を導入する入口と、測定が終了した試料液を前記排出手段で排出する出口を有し、
前記磁界発生手段の磁極を有する面は、前記入口から出口へと向かう試料の流れ方向に対して垂直となる向きに設置されていることを特徴とする試料分析装置。
- 試料液を流すための流路と、
前記流路内の捕捉領域にて、試料液中の特定物質に結合した磁性粒子を捕捉する磁界発生手段を備えた検出器において、
前記磁界発生手段は、前記補足領域に対向する面において、前記検出流路の流れ方向と垂直方向の幅が当該補足領域の幅よりも少なくとも1カ所でも大きいことを特徴する検出器。
- 請求項9記載の検出器において、
前記磁界発生手段は、前記補足領域に対向する面において、前記検出流路の流れ方向と垂直方向の幅が前記補足領域の幅よりすべての領域で大きいことを特徴する検出器。
- 請求項9記載の検出器において、
前記磁界発生手段は、前記補足領域に対向する面において、前記検出流路の流れ方向と平行方向の長さが、前記捕捉領域の長さより少なくとも1カ所でも小さいことを特徴する検出器。
- 請求項11記載の検出器において、
前記磁界発生手段は、前記補足領域に対向する面において、前記検出流路の流れ方向と平行方向の長さが、前記捕捉領域の長さより全ての領域で小さいことを特徴する検出器。
- 請求項9または10に記載の検出器において、
前記補足領域において、前記検出流路の流れ方向と垂直方向における前記磁界発生手段の幅をa、捕捉領域の流路幅をbとした場合、これらの比a/bが1.0より大きく1.7以下の範囲であることを特徴とする検出器。
- 請求項13記載の検出器において、
aがbよりも0.6mm以上大きいことを特徴とする検出器。
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US20150056098A1 (en) | 2015-02-26 |
CN104067123A (zh) | 2014-09-24 |
EP2799871A4 (en) | 2016-03-16 |
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JPWO2013099648A1 (ja) | 2015-05-07 |
JP6313977B2 (ja) | 2018-04-18 |
CN104067123B (zh) | 2016-02-17 |
EP2799871A1 (en) | 2014-11-05 |
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