WO2010116507A1 - 検出装置及び検出方法 - Google Patents
検出装置及び検出方法 Download PDFInfo
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- WO2010116507A1 WO2010116507A1 PCT/JP2009/057269 JP2009057269W WO2010116507A1 WO 2010116507 A1 WO2010116507 A1 WO 2010116507A1 JP 2009057269 W JP2009057269 W JP 2009057269W WO 2010116507 A1 WO2010116507 A1 WO 2010116507A1
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- detection
- detection device
- nonwoven fabric
- liquid sample
- reagent
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- 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
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- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/536—Immunoassay; Biospecific binding assay; Materials therefor with immune complex formed in liquid phase
- G01N33/537—Immunoassay; Biospecific binding assay; Materials therefor with immune complex formed in liquid phase with separation of immune complex from unbound antigen or antibody
- G01N33/538—Immunoassay; Biospecific binding assay; Materials therefor with immune complex formed in liquid phase with separation of immune complex from unbound antigen or antibody by sorbent column, particles or resin strip, i.e. sorbent materials
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Definitions
- the present invention relates to a detection apparatus and a detection method.
- devices described in Patent Documents 1 to 3 are known as strip-shaped detection devices that detect a substance to be detected in a liquid sample derived from a living body.
- the liquid sample is collected from the living body, and the collected liquid sample is subjected to a predetermined treatment such as dilution or extraction, and then applied to the apparatus. That is, a complicated operation through a plurality of steps is required.
- Patent Document 4 a detection device for directly collecting a sample from a living body has been proposed.
- the living body when collecting a liquid sample directly from a living body, the living body may feel pain such as pain due to the detection device coming into contact with the living body. Further, in order to collect a large amount of liquid sample, it is necessary to bring the detection device into contact with the living body for a long time, which further increases the burden on the living body. On the other hand, if the contact time between the living body and the detection device is shortened in order to reduce the burden on the living body, it becomes difficult to obtain a sufficient amount of liquid sample, resulting in variations in measured values and sufficient detection. No result can be obtained. Thus, conventionally, when directly collecting a liquid sample from a living body, there are problems such as a heavy burden on the living body, a small amount of collection, and low detection sensitivity.
- Patent Document 4 mentions the material of the portion from which the liquid sample is collected, it does not fully describe a specific configuration for solving these problems.
- an object of the present invention is to provide a detection device and a detection method capable of obtaining a sufficient detection result by directly collecting a liquid sample from a living body and reducing the burden on the living body. .
- the present invention is a strip-shaped detection device that detects a substance to be detected in a liquid sample, and includes a collecting member that directly collects a liquid sample from a living body and a labeling reagent that specifically binds to the substance to be detected.
- a detection member including a reagent, to which the detection reagent is fixed, an absorption member capable of absorbing a liquid sample, and a liquid-impermeable support member, and a sampling member, a holding member, a detection member, and an absorption member are provided
- the liquid sample is arranged in the longitudinal direction of the detection device on the support member so that the liquid sample moves in this order by capillary action in these members, and the sampling member is located upstream in the movement direction of the liquid sample. Including projecting portion that projects protrudes from the support member, the detection device.
- the collection member that directly collects the liquid sample from the living body includes a protruding portion that protrudes from the support member.
- the detection device includes a liquid-impermeable support member
- the liquid-impermeable support member is preferably provided on the lower surface of the detection member and the lower surface of the absorption member from the viewpoint of preventing leakage from the back surface of the liquid sample, and from the viewpoint of preventing backflow of the liquid sample.
- a supporting member is also provided on the downstream side.
- the detection apparatus can obtain a sufficient detection result by directly collecting a liquid sample from a living body, and can reduce the burden on the living body.
- the detection apparatus of the present invention can be suitably used as a chromatography detection apparatus for detecting a substance to be detected in a liquid sample, for example, a chromatography detection apparatus for directly collecting a liquid sample such as tears from a living body.
- the holding member has a portion that overlaps with a part of the detection member, and the length along the longitudinal direction of the overlapping portion is equal to or longer than the length along the longitudinal direction of the portion of the holding member where the labeling reagent is held. It is preferable that the length is longer than the length along the longitudinal direction of the portion where the labeling reagent is held. This increases the contact area between the holding member and the detection member, so that the liquid sample is easily moved from the holding member to the detection member by capillary action, and the detection time is shortened. The burden is reduced. In this case, it is more preferable that these members are overlapped so that the holding member faces up.
- the liquid-impermeable support member is preferably provided on the lower surface of the overlapping part, and at least 5 mm upstream of the overlapping part. More preferably, it is provided. Thereby, the leakage of the liquid sample is more effectively suppressed.
- the collecting member and the holding member preferably share a single fiber substrate.
- the holding member is formed by holding the labeling reagent at the downstream end of the fiber base in the moving direction.
- the sampling member and the holding member are integrated and a single fiber base material is used, so that the apparatus configuration is simplified, manufacturing steps and costs can be reduced, and the liquid sample is removed from the sampling member. It becomes easy to move to the holding member by capillary action.
- the fiber base has a portion that overlaps with a part of the detection member, and is along the longitudinal direction of the overlapped portion.
- the length is preferably not less than the length along the longitudinal direction of the portion where the labeling reagent is held in the fiber substrate, and is longer than the length along the longitudinal direction of the portion where the labeling reagent is held. Is more preferable.
- the fiber base material is overlapped on the detection member. Therefore, since the capillary flow of the up-down direction arises in the overlapping part, it becomes easier to move a liquid sample from a fiber base material to a detection member by a capillary phenomenon.
- the sampling member or fiber base material is preferably a nonwoven fabric containing pulp.
- Nonwoven fabric containing pulp has a large amount of water retention per unit mass, that is, has a high water retention capacity, so even if the amount of the substance to be detected contained in the liquid sample is very small, the detection sensitivity can be increased by increasing the amount of collected liquid sample. Can be improved.
- the nonwoven fabric containing a pulp is a soft material, it is desirable also in the point that it is hard to produce pain when it contacts a biological body.
- the detection sensitivity of the substance to be detected can be increased by using the nonwoven fabric as a sampling member.
- the nonwoven fabric containing pulp is suitably used as the fiber substrate in the detection device in which the sampling member and the holding member are integrated. Due to the above advantages, the nonwoven fabric containing pulp is suitable as a sampling member for a chromatography detection device that can sufficiently reduce the burden on a living body when a liquid sample is directly collected from the living body.
- the pulp is preferably wood pulp. Since wood pulp has a particularly high water retention capacity, the use of wood pulp makes it easier to obtain the effect of improving the detection sensitivity.
- the rayon and / or synthetic fiber may be further blended with the nonwoven fabric containing the pulp.
- blending these the intensity
- the non-woven fabric blended with synthetic fibers is preferable in that the water absorption rate is good.
- the nonwoven fabric is preferably a compressed nonwoven fabric.
- the density of the nonwoven fabric is preferably 40 mg / cm 3 or more, more preferably 45 mg / cm 3 or more, further preferably 50 mg / cm 3 or more, and 55 mg / cm 3. More preferably, it is more preferably 60 mg / cm 3 or more.
- the thickness of the nonwoven fabric is preferably 0.8 mm or less, more preferably 0.75 mm or less, further preferably 0.7 mm or less, and further preferably 0.65 mm or less. preferable.
- Such a non-woven fabric can be obtained, for example, by compressing a non-woven fabric containing ordinary pulp by 10% or more. That is, it can be obtained by compressing a nonwoven fabric containing normal pulp at a compression rate of 10% or more to a thickness of 90% or less.
- the nonwoven fabric is obtained by compressing a nonwoven fabric containing ordinary pulp by 20% or more, that is, by compressing the nonwoven fabric to a thickness of 80% or less. More preferably, the said nonwoven fabric is obtained by compressing the nonwoven fabric containing a normal pulp 30% or more, ie, compressing until it becomes the thickness of 70% or less.
- the maximum width of the sampling member, holding member, and detection member in the direction orthogonal to the longitudinal direction is preferably 0.8 mm to 3 mm.
- this width is larger than 3 mm, the amount of liquid sample necessary for detection increases, and there is a tendency that a sufficient amount of liquid sample cannot be collected.
- the width is smaller than 0.8 mm, it tends to be difficult to confirm the captured color by the labeling reagent on the detection member.
- the detection member preferably further includes a control reagent that specifically binds to the labeling reagent.
- the control reagent is fixed on the downstream side of the detection reagent.
- the control reagent binds to the labeling reagent that has moved with the movement of the liquid sample on the downstream side of the detection reagent, whereby it can be confirmed that a sufficient amount of the liquid sample has been collected.
- the liquid-impermeable support member is preferably provided on the lower surface of the overlap part, and is provided at least 5 mm downstream of the overlap part. More preferably, it is even more preferable that it is provided at least 10 mm downstream.
- the length of the protruding portion is preferably 5 mm or more.
- the length of the protruding portion is less than 5 mm, when a liquid sample is collected from the living body, members other than the collecting member of the detection device can easily touch the living body, which may cause pain to the living body.
- the liquid sample is tear fluid
- the protruding portion is inserted into the lower conjunctival circle of the living body, bent at the outer edge of the lower eyelid, and the tear fluid is collected with the detection device hanging vertically In this case, the protruding portion needs to have a sufficient length.
- the detection device further includes a first adhesive member.
- the first adhesive member adheres to the surface on the opposite side of the support member at the downstream end of the sampling member, the holding member, and the upstream end of the detection member, and is opposite to the adhesive surface. It has a non-adhesive surface on the side.
- the first adhesive member can prevent the separation of these members from each other by bonding the sampling member, the holding member, and the detection member, and can increase the strength of the detection device. Further, the first adhesive member covers the surface of the member, thereby preventing the liquid sample from volatilizing from these members and obtaining a sufficient detection result with a smaller amount of collection. Furthermore, the first adhesive member promotes the movement of the liquid sample by capillary action by covering the above-mentioned member so as to press it down.
- the detection device further includes a second adhesive member.
- the second adhesive member is bonded so as to sandwich the downstream end portion of the detection member, the absorbing member, and the downstream end portion of the support member, and the second adhesive member is bonded to the respective members. And a non-adhesive surface on the opposite side of the adhesive surface. It is preferable that a knob portion is formed at the downstream end portion of the second adhesive member by bonding the second adhesive members to each other at the folded portion of the second adhesive member.
- the second adhesive member can prevent the members from being separated from each other by bonding the detection member, the absorption member, and the support member, and can increase the strength of the detection device. In particular, by adhering these members so as to be sandwiched from the downstream side, the second adhesive member can effectively strengthen the structure of the detection device.
- the second adhesive member covers the surface of the absorbing member, and the outer surface (the surface opposite to the adhesive surface) is non-adhesive so that the downstream end of the detection device can be picked up.
- the user's hand that is used is not polluted. In particular, when the user uses the detection device with the knob portion, the possibility that the reagent or the like touches the user's hand becomes lower, and it can be used safely. That is, the second adhesive member functions as a handle portion of the detection device.
- the support member preferably includes a first support that also serves as a backing for the detection member, and a second support provided on the opposite side of the detection member of the first support.
- the second support is separated in the longitudinal direction on the first support. Since the second support is separated, the arrangement pattern of the second support can be changed to easily adjust the length of the detection device, and manufacturing variations can be obtained. Note that when the second support is separated except on the first support, the liquid sample is likely to leak out of the apparatus.
- the second support is preferably provided on the lower surface of the absorbing member from the viewpoint of preventing leakage from the back surface of the liquid sample, and from the viewpoint of preventing backflow of the liquid sample in addition to preventing leakage from the back surface. More preferably, it is provided on the downstream side.
- the second support is preferably provided on the lower surface of the overlapping part, and is provided up to at least 5 mm upstream of the overlapping part. It is more preferable. Further, when a part of the detection member overlaps with a part of the absorption member, the second support body needs to be provided on the lower surface of the overlap part, and is provided at least 5 mm downstream of the overlap part. It is more preferable that it is provided, and it is even more preferable that at least 10 mm downstream is provided. As a result, leakage of the liquid sample is more effectively suppressed.
- the support member has a function of enhancing capture color development by the labeling reagent. This facilitates confirmation of the captured color development on the detection member, and the detection target substance can be easily detected.
- the detection device preferably further includes a background member having a function of enhancing capture color development by the labeling reagent on the opposite side of the support member from the detection member.
- a background member having a function of enhancing capture color development by the labeling reagent on the opposite side of the support member from the detection member.
- Capture color development refers to the color development (detection line) that can be confirmed by the coloration of the label of the labeled reagent bound (captured) to the substance to be detected or the control reagent at the detection reagent fixing part or the control reagent fixing part.
- the background member is white because the detection line is easy to see.
- the background member is preferably a paper tape having an adhesive surface on the support member side. Since the background member is a paper tape, a mark indicating the position where the detection reagent or the control reagent is fixed can be easily attached to the surface of the background member opposite to the support member by coloring or the like. .
- the support member includes a plurality of supports, the background member can reinforce the detection device by bonding the supports together.
- the support member extends 2 mm or more upstream from the background member.
- the liquid sample in the collection member may permeate the background member.
- the background rises or the detection device is drowned, which tends to make it difficult to confirm the captured color.
- the liquid sample penetrates from the collection member into the background member, the amount of the liquid sample that moves to the holding member or the detection member is reduced accordingly, so that the sensitivity is lowered and sufficient detection results tend not to be obtained. .
- the mass of the detection device is preferably 0.8 g or less.
- the mass is heavier than 0.8 g, for example, the liquid sample is tear fluid, and when the tear device is collected by hanging the detection device vertically from the lower conjunctival circle of the living body, the detection device itself It may fall depending on the weight.
- the detection device is particularly useful when the living body is a human and the liquid sample is tear fluid.
- the burden on the subject accompanying collection of tears is large.
- tear fluid can be collected without imposing an excessive burden on such a subject. Even if the amount of tear fluid collected is less than 10 ⁇ L, sufficient detection results can be obtained. Obtainable.
- the detection apparatus is particularly useful when the substance to be detected is an IgE antibody.
- the labeling reagent is an antibody with an IgE antibody as an antigen labeled with a labeling substance
- the detection reagent is an antibody with an IgE antibody as an antigen that contains a recognition site different from the antibody possessed by the labeling reagent.
- the control reagent is an antibody whose antigen is the antibody possessed by the labeling reagent.
- the present invention relates to a detection method for detecting a substance to be detected in a liquid sample using the detection device.
- this detection method it is possible to obtain a sufficient detection result by directly collecting a liquid sample from a living body without imposing an excessive burden on the living body.
- the present invention it is possible to provide a detection device and a detection method capable of obtaining a sufficient detection result by directly collecting a liquid sample from a living body and reducing the burden on the living body. .
- SEM scanning electron microscope
- FIG. 1 is a side end view showing an embodiment of a detection apparatus according to the present invention.
- a detection apparatus 1 shown in FIG. 1 is for detecting an IgE antibody (substance to be detected) in human tears (liquid sample).
- the detection device 1 has a strip shape (elongated shape such as a strip or a strip) having a width of about 1.5 mm and a length of about 57 mm, for example, and has a mass of about 0.032 g.
- the detection apparatus 1 includes a sampling member 10, a holding member 12, a detection member 14, an absorption member 16, a support member 18, a first adhesive member 20a, a second adhesive member 20b, and a background member 22. Is provided.
- the collection member 10, the holding member 12, the detection member 14, and the absorption member 16 are arranged in the longitudinal direction of the detection device 1 on the support member 18 so that the tear fluid moves in these order by capillary action in these members. Has been.
- the collection member 10 is a member also called a “sample pad” used for absorbing and holding a liquid sample in the detection device 1.
- examples of the material for the collecting member 10 include filter paper, cotton yarn, polyester, and glass fiber.
- the collecting member 10 is preferably a nonwoven fabric containing pulp.
- Pulp refers to cellulose fibers extracted by treating wood and other plants with mechanical and / or chemical methods.
- Nonwoven fabric refers to a fabric that is not woven, knitted, or laminated in a certain direction or random direction into a sheet, and is different from knitted fabric, paper, film, etc. is there.
- Examples of the method for obtaining a nonwoven fabric by forming the superposed fibers into a sheet form include a method of heating, a method of intertwining fibers, a method of using an adhesive, and the like.
- filter paper is paper mainly used for filtration, and is different from non-woven fabric.
- filter papers made from cotton fibers of seed wool (cotton linters) at the center of cotton flowers, and those made from borosilicate glass fibers. It is manufactured by processing so as to obtain properties (particle retention capacity ( ⁇ m), initial filtration rate, load capacity, ash content, etc.).
- the nonwoven fabric containing the above pulp has a large amount of water retention per unit mass, that is, its water retention capacity is high, so even if the amount of the substance to be detected contained in the liquid sample is very small, it can be detected by increasing the amount of collected liquid sample. Sensitivity can be improved. Moreover, since the nonwoven fabric containing a pulp is a soft material, it is difficult to cause pain when it comes into contact with a living body, and it is desirable in that it can reduce the burden on the living body when a liquid sample is directly collected from the living body.
- the use of the nonwoven fabric as the sampling member 10 can increase the separation ability of the substance to be detected.
- the sampling member 10 and the holding member 12 share a single fiber base material
- a downstream side of the fiber base material is used as the fiber base material by using a non-woven fabric containing the above-mentioned pulp that is difficult for liquid to diffuse.
- the labeling reagent held at the end of this is held near the end without touching the living body when the liquid sample is directly collected from the living body. Therefore, the nonwoven fabric containing pulp is suitably used as the fiber substrate in the detection device 1 in which the sampling member 10 and the holding member 12 are integrated.
- the pulp contained in the sampling member 10 is preferably a wood pulp made from wood because of its higher water holding power, and is produced by a mechanical method of producing pulp by crushing wood with physical force. It is preferred that Examples of wood pulp include pulp made from coniferous trees and pulp made from hardwoods.
- the content of the pulp contained in the sampling member 10 is preferably 60% or more, more preferably 80% or more, and further preferably 90% or more.
- the sampling member 10 can be manufactured based on a known method.
- the sampling member 10 which is a nonwoven fabric containing pulp can be manufactured by dispersing pulp fibers in the air by an airlaid system to form a mat, and bonding with a special binder to form a sheet.
- the rayon and / or synthetic fiber may be further blended with the nonwoven fabric containing the pulp.
- blending these the intensity
- the non-woven fabric blended with synthetic fibers is preferable in that the water absorption rate is good.
- “Rayon” is a recycled fiber produced by dissolving cellulose fiber such as pulp in alkali such as sodium hydroxide and carbon disulfide into viscose and spinning in acid. Is different.
- “Synthetic fiber” is a synthetic polymer obtained by polymerizing a low molecular weight monomer chemically synthesized from petroleum, natural gas, etc. as a raw material into fibers by various spinning methods. .
- a non-woven fabric blended with rayon can be produced by laminating rayon on both sides or one side when the mat is formed. Moreover, the nonwoven fabric with which synthetic fiber was mix
- the sampling member 10 is preferably a compressed nonwoven fabric.
- the compressed nonwoven fabric By using the compressed nonwoven fabric, the movement / penetration speed of the liquid sample in the detection device 1 is increased, the detection time is shortened, and the burden on the living body of a dry eye patient or the like is reduced.
- the density of the nonwoven fabric is preferably 40 mg / cm 3 or more.
- the thickness of the said nonwoven fabric is 0.8 mm or less.
- the compressed nonwoven fabric can be obtained, for example, by compressing a nonwoven fabric containing ordinary pulp at a compression rate of 10% or more until a thickness of 90% or less.
- the collecting member 10 includes a protruding portion 10a protruding from the support member 18 on the upstream side (hereinafter simply referred to as “upstream side”) in the lacrimal fluid movement direction, and a non-projecting portion 10b that is the other portion. Including.
- the protruding portion 10a is exposed without being covered by other members such as the support member 18 and the first adhesive member 20a. Further, the protruding portion 10a has a strip shape and has a flat surface at the end. The length of the protruding portion 10a is preferably 5 mm or more.
- the protruding portion 10a When collecting human tears using the detection device 1, the protruding portion 10a is inserted into the subject's lower conjunctival dome and the tears are collected with the detection device hanging vertically. .
- the protruding portion 10a is made of a fiber base material such as a pulp nonwoven fabric, it becomes easy to absorb tears.
- a fiber base material is a weak irritation
- stimulation material even if the protrusion part 10a touches an eyeball, it is hard to give pains, such as a pain, to a subject.
- the protruding portion 10a has a strip shape, a series of operations are facilitated.
- the protruding portion 10a has a flat surface, and the surface of the protruding portion 10a comes into contact with the sample collection site. Can be further reduced. Moreover, when the length of the protrusion part 10a is 5 mm or more, it can prevent that members other than the collection member 10 touch an eyeball etc. of a subject.
- the lacrimal fluid absorbed by the collection member 10 then moves to the holding member 12 by capillary action.
- the holding member 12 includes a fiber base material such as a pulp nonwoven fabric and a labeling reagent that specifically binds to the IgE antibody.
- This labeling reagent is obtained by labeling an antibody having an IgE antibody as an antigen with a gold colloid (labeling substance).
- the labeling reagent is retained on the fiber base material in a state where it can be eluted with the tear fluid and move with the movement of the tear fluid.
- the labeling reagent In the process in which the labeling reagent moves in the holding member 12 and the detection member 14 along with the movement of the tear, the labeling reagent binds to the IgE antibody in the tear and forms a conjugate of the IgE antibody and the labeling reagent.
- latex beads can be used besides gold colloid.
- red or blue colored particles that do not require a special device or the like for confirmation of the label and can be easily confirmed visually.
- the holding member 12 shares a single fiber base material with the sampling member 10, and the downstream side in the tear fluid movement direction of the fiber base material (hereinafter simply referred to as “downstream side”).
- the holding member 12 is formed by holding the labeling reagent at the end of.
- the strength of the detection device 1 can be increased.
- the liquid sample can easily move from the collection member 10 to the holding member 12 by capillary action.
- the fiber base material shared by the collecting member 10 and the holding member 12 has a portion that overlaps a part of the detection member 14, and the length along the longitudinal direction of the overlapping portion is determined by holding the labeling reagent.
- the length is preferably equal to or longer than the length of the formed holding member 12 in the longitudinal direction. That is, it is preferable that the length is not less than the length along the longitudinal direction of the portion where the labeling reagent is held.
- the fiber base material is overlapped so as to be on the detection member 14. Thereby, since the capillary flow in the vertical direction is generated at the overlapping portion, the liquid sample is easily moved from the collection member 10 and the holding member 12 to the detection member 14 by capillary action.
- the length of the portion where the fiber base material and the detection member 14 overlap is more preferably longer than the length of the portion (holding member 12) where the labeling reagent is held.
- the manufacturing restrictions such as lengthening the liquid-impermeable support member and fixing with a longer adhesive tape so that the overlapping portion is difficult to peel off increase.
- the length in the longitudinal direction of the portion where the fiber base material and the detection member 14 overlap is preferably 6 mm or less, and more preferably 5 mm or less. If the length of the overlapping portion is longer than 5 mm, the volume of the portion into which tear fluid permeates increases, so that it is difficult to collect a sufficient amount of tear fluid for detection.
- the detection member 14 includes a nitrocellulose film 14c, and a detection reagent and a control reagent fixed thereto.
- the detection reagent is fixed in a line perpendicular to the longitudinal direction of the detection apparatus 1 at the detection reagent fixing portion 14a on the nitrocellulose film 14c.
- the detection reagent is an antibody that includes a recognition site for the IgE antibody and specifically binds to the IgE antibody, and includes a recognition site that is different from the antibody that the labeling reagent has.
- the detection reagent specifically binds to the IgE antibody, thereby capturing the conjugate of the IgE antibody and the labeling reagent.
- a line of a color derived from the labeling substance appears in the detection reagent fixing part 14a. By visually confirming the line, it can be determined that the IgE antibody is present in the tear fluid.
- the control reagent is fixed in a line perpendicular to the longitudinal direction at the control reagent fixing part 14b located on the downstream side of the detection reagent fixing part 14a on the nitrocellulose membrane 14c.
- the control reagent is an antibody having the antibody contained in the labeling reagent as an antigen.
- a color line derived from the labeling substance appears in the control reagent fixing part 14b.
- the absorbing member 16 is made of a material capable of absorbing tears such as cellulose.
- the absorbing member 16 absorbs tear fluid and labeling reagent that have moved from the detecting member 14 by capillary action.
- the absorbing member 16 absorbs the developing solution, so that the developing solution is smoothly developed. That is, the absorbing member 16 has a function of preventing the backflow of the developing liquid.
- the absorbing member 16 also has a function of removing impurities washed away by the developing solution from the detecting member 14.
- the support member 18 is made of a liquid-impermeable material such as PET.
- the support member 18 includes a first support 18a and a second support 18b.
- the first support 18a preferably has the same length and width as the detection member 14, and doubles as the backing of the detection member 14.
- the first support 18a reinforces the structure of the detection device 1 and prevents the detection device 1 from dripping or bending during operation.
- the first support 18a is made of a liquid-impermeable material, the tear fluid in the detection member 14 moves in the longitudinal direction in the detection member 14 without penetrating the first support 18a. can do.
- the second support 18b is a transparent adhesive film made of PET or the like, for example, but may be a non-transparent adhesive film or the like instead.
- the second support 18b is provided on the opposite side of the detection member 14 of the first support 18a, and is a portion that overlaps the first support 18a, and is preferably about 5 mm away from the longitudinal direction. Are separated.
- the second support 18b preferably extends 2 mm or more upstream from the background member 22.
- the second support 18b has an adhesive surface on the first support 18a side, and is bonded to the sampling member 10, the holding member 12, the detection member 14, and the detection member 14 and the absorption member 16, thereby detecting the detection device. 1 is reinforced. Since the second support 18b is made of a liquid-impermeable material, the tear fluid in the collection member 10 and the holding member 12 does not penetrate into the second support 18b, and the longitudinal direction passes through each member. Can be moved to. In addition, there is no possibility that tears or a developing solution penetrates from the absorbing member 16 into the second support 18b and leaks out of the detection device 1 to stain the user's hand. Furthermore, since the second support 18b made of a liquid-impermeable material extends 2 mm or more upstream from the background member 22, the liquid can be prevented from penetrating into the background member 22.
- the length of the detection device 1 can be easily adjusted by changing the arrangement pattern of the second support 18b. Variations are obtained.
- the first adhesive member 20a and the second adhesive member 20b are made of, for example, paper adhesive tape.
- the first adhesive member 20a has an adhesive surface, on the downstream end of the sampling member 10 (that is, the non-projecting portion 10b), the holding member 12, and the upstream end of the detection member 14 on the adhesive surface. It is bonded to the surface opposite to the support member 18.
- the first adhesive member 20a has a non-adhesive surface on the side opposite to the adhesive surface.
- the first adhesive member 20a adheres the sampling member 10, the holding member 12, and the detection member 14, thereby preventing these members from being separated from each other and increasing the strength of the detection device 1. Further, the first adhesive member 20a covers the surfaces of these members, thereby preventing the tear fluid from volatilizing from these members and making it possible to obtain sufficient detection results with a smaller amount of collection. . Furthermore, the 1st adhesion member 20a accelerate
- the second adhesive member 20b has an adhesive surface, and the downstream end of the detection member 14, the absorbing member 16, and the downstream end of the second support 18b are connected to the downstream side of the adhesive member 20b. Adhesive so as to sandwich.
- the second adhesive member 20b has a non-adhesive surface on the side opposite to the adhesive surface, and further has a knob portion 20b ′ at the downstream end.
- the knob portion 20b ' is formed by bonding the second adhesive members 20b to each other at the folded portion of the second adhesive member 20b.
- the second adhesive member 20b adheres the detection member 14, the absorption member 16 and the second support 18b, thereby preventing them from being separated from each other and increasing the strength of the detection device 1.
- the second adhesive member 20b can effectively strengthen the structure of the detection device 1 by adhering them so as to be sandwiched from the downstream side.
- the second adhesive member 20b covers the surface of the absorbing member 16 and has a non-adhesive surface on the outside, so that the user's hand used by picking up the downstream end of the detection device 1 is not contaminated.
- the second adhesive member 18 b functions as a handle (handle) portion of the detection device 1.
- the background member 22 is provided on the opposite side of the support member 18 from the detection member 14.
- the background member 22 is, for example, a white paper tape (such as office sticker paper) having an adhesive surface on the support member 18 side.
- a white paper tape such as office sticker paper
- marks indicating the positions of the detection reagent fixing part 14a and the control reagent fixing part 14b are colored.
- the detection reagent fixing part 14a and the control reagent fixing part 14b are shown, it is easy to confirm the red line at each position. Furthermore, since the background member 22 has an adhesive surface, the first support body 18a and the second support body 18b are bonded by the adhesive surface, and the structure of the detection device 1 is strengthened.
- the background member 22 is made of paper, if a liquid such as tears permeates the background member 22, the background rises or the detection device drowns, making it difficult to confirm the captured color by the labeling reagent.
- the amount of tear fluid that moves to the detection member 14 may decrease, and a sufficient detection result may not be obtained.
- the first support 18 a extends 2 mm or more upstream from the background member 22.
- the detection apparatus 1 can be manufactured by a manufacturing method including the following steps (1) to (7), for example.
- the labeling reagent is held at the end of the sheet-like pulp nonwoven fabric (formation of the sampling member 10 and the holding member 12).
- a nitrocellulose film 14c is formed by lamination on a sheet-like PET (first support 18a).
- a detection reagent and a control reagent are linearly applied on the nitrocellulose film 14c and fixed (formation of the detection member 14).
- the sampling member 10, the holding member 12, and the first support 18a are bonded with a transparent adhesive film (second support 18b). Further, the collecting member 10, the holding member 12, and the nitrocellulose film 14c are bonded by a paper adhesive tape (first adhesive member 20a).
- the first support 18a and the absorbent member 16 made of cellulose are bonded together with a transparent adhesive film (second support 18b). Further, the second support 18b, the absorbing member 16, and the nitrocellulose film 14c are bonded by a paper adhesive tape (second adhesive member 20b). (6) The office sticker paper (background member 22) is bonded to the first support 18a, the second support 18b, and the second adhesive member 20b. (7) The multilayer structure card thus formed is cut into a 1.5 mm wide strip.
- the present invention is not limited to the above embodiment, and the above embodiment can be appropriately modified without departing from the gist of the present invention.
- the second support 18b may not be separated.
- the length adjustment of the detection device 1 cannot be facilitated, but the structure of the detection device 1 can be further strengthened.
- the 2nd adhesion member 20b may adhere
- the support member 18 may be integrally formed. Further, as illustrated in FIG. 4, the detection device 1 may not include the background member 22. In this case, it is preferable that the support member 18 has a function of enhancing capture color development by the labeling reagent. That is, it is preferable that the support member 18 is not transparent but has a color such as white, which facilitates visual confirmation of the captured color.
- the absorbing member 16 may extend downstream from the support member 18.
- the sampling member 10 and the holding member 12 are not integrated, and may be made of different fiber base materials. In this case, it is preferable that a part of the collecting member 10 and a part of the holding member 12 overlap each other. As a result, the structure is strengthened, and the tear fluid can easily move from the collection member 10 to the holding member 12 by capillary action.
- the detection device 1 may not include the first adhesive member 20a and the second adhesive member 20b.
- the support member 18 has an adhesive surface, and the members can be bonded to each other by the adhesive surface.
- Tear was collected using the detection apparatus shown in FIG.
- the downstream side of the single fiber substrate shared by the collection member 10 and the holding member 12 overlaps the upstream side of the detection member 14 with a length of 1 mm, and an antibody solution (OD 520 8) labeled with gold colloid is present.
- a detection device was prepared which was applied at a length of about 2.5 mm to the downstream end of the fiber substrate in an amount of 22 ⁇ L / cm.
- Each fiber substrate was cut into a 2 cm ⁇ 2 cm square, and the mass (a) of each fiber substrate piece in a dry state was measured.
- Each fiber substrate piece is placed in a tray containing 15 mL of ultrapure water, shaken for 30 minutes in a sufficiently immersed state in ultrapure water, then pulled up on parafilm and absorbed.
- the mass (b) of the piece was measured.
- each fiber base piece was pulled up on a metal sieve (32 mesh) and drained for 10 minutes, and then the mass of each fiber base piece. (C) was measured.
- the water holding power I of the wood pulp nonwoven fabrics (A) to (E) is 21.8 to 29.9, and the water holding power II is 18.2 to 20.7, both of which are relatively high numerical values.
- the water holding powers I and II of the filter paper (F), hydroxy polyester (G) and glass fiber (H) were all relatively low values. From the above results, it has been clarified that the nonwoven fabric made of wood pulp as a raw material has higher water retention capacity than filter paper made of cotton fiber as a raw material, hydroxy polyester, and glass fiber.
- each of the antibody solution labeled with gold colloid using a pipetteman is dropped at two locations on the surface of each fiber substrate, and the diameter of each spot when the spread of the spot completely stops. (Diameters 1 and 2) were measured.
- the spot diameter in the wood pulp non-woven fabrics (A) to (E) was relatively small, 3.5 to 4.0 mm, whereas the spot diameter in the filter paper (F) was 11.0 mm. And it was relatively big. From the above results, it has been clarified that the nonwoven fabric made of wood pulp as a raw material has a higher ability to retain the labeling reagent than the filter paper made of cotton fiber as a raw material, making it difficult for liquid to diffuse.
- each fiber substrate is cut, and three fiber substrate pieces each having a length of 6 cm and a width of 1.7 cm are prepared, and a line is drawn with a magic at 0.5 cm from the end in the long side direction. It was.
- prepare a tray filled with water immerse each fiber base piece in the water in the tray up to the line drawn with the magic, and tape the upper end of each fiber base piece to the wall of the tray. Fix and let stand for 3 minutes.
- each fiber base piece is taken out from the tray, placed on the parafilm, and the vertical distance (maximum reach distance) to the point where the water sucked up from the line drawn with the magic reaches the highest in the vertical direction is the most.
- the vertical distance (minimum reach) to the point that reached low was measured. The longer the maximum reach distance, the faster the water absorption speed.
- Table 3 is an average value in each of the three fiber substrate pieces.
- FIG. 4 is a scanning electron microscope (SEM) photograph of the cross section of the fiber substrates (A) to (H).
- each of the wood pulp nonwoven fabrics (A) to (E) had a unique structure in which thick fibers were stacked in layers while maintaining a certain amount of space.
- the filter paper (F) has a structure in which fibers are compressed and almost no space exists, and the glass fibers (H) have very thin glass fibers stacked closely, and there is only a very small space. Had a structure.
- Detection time reduction effect (1) Detection time shortening effect by compressed fiber base material
- Each of the following two types of detection devices using wood pulp nonwoven fabric was prepared as a sampling member.
- "Kinocross KS-40" (Oji Kinocross Co., Ltd.): thickness average 1.03 mm (minimum value 0.85 to maximum value 1.15 mm), density 39.3 mg / cm 3
- "KS-40 press product” compression rate 36.9%: thickness average 0.65 mm (minimum value 0.5 to maximum value 0.75 mm), density 58.9 mg / cm 3
- the “thickness average” of the above two types of wood pulp nonwoven fabric is an average value obtained by preparing a nonwoven fabric having a width of 17 mm and a length of 25 cm, and measuring the thickness at any 10 locations with calipers. Describes the minimum and maximum values of 10 measurements.
- Sample 1 physiological saline (manufactured by Otsuka Pharmaceutical Co., Ltd.), total IgE concentration 0 (IU / mL)
- Sample 2 Total IgE concentration 8.73 (IU / mL)
- Sample 3 Total IgE concentration 34.05 (IU / mL)
- the detection time is reduced by an average of 50% or more compared to the detection device using uncompressed KS-40. It was. In particular, when the amount of the liquid sample was 5 ⁇ L, the detection time was shortened by 65.7%. From the above results, it was revealed that the use of a compressed nonwoven fabric as the collection member and / or the holding member shortens the detection time and reduces the burden on living bodies such as dry eye patients.
- Sample 1 physiological saline (manufactured by Otsuka Pharmaceutical Co., Ltd.), total IgE concentration 0 (IU / mL)
- Sample 2 Total IgE concentration 8.73 (IU / mL)
- Sample 3 Total IgE concentration 34.05 (IU / mL)
- the detection time was shortened compared with the case where the length of the overlapping portion was less than 3 mm. From the above results, the detection time can be increased by making the length of the overlapping portion of the fiber base material consisting of the sampling member and the holding member and the detection member longer than the length of the holding member that is the portion where the labeling reagent is held. It became clear that it was shortened. From this, it was estimated that the detection time was shortened even when the amount of the liquid sample was smaller, suggesting that the burden on dry eye patients and the like was reduced.
- the detection apparatus and detection method of the present invention can be used for allergy diagnosis such as pollinosis by detecting IgE antibodies in human tears.
- the detection apparatus and detection method of the present invention can use any body fluid such as nasal discharge, blood, wound exudate, etc. as a liquid sample, and remove antibodies and foreign substances contained in the body fluid. By detecting it, it can be used for diagnosis of allergies and infectious diseases.
- the detection device and the detection method of the present invention have a portion where the holding member and the detection member overlap each other with a suitable length along the longitudinal direction, and also use a compressed nonwoven fabric as the sampling member. Therefore, the detection time can be shortened, so that it is suitably used for dry eye patients and the like for which it is difficult to collect a sufficient amount of tears.
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Abstract
Description
(1)シート状のパルプ不織布の端部に標識試薬を保持させる(採取部材10及び保持部材12の形成)。
(2)シート状のPET(第1の支持体18a)上にニトロセルロース膜14cをラミネートにより形成する。
(3)ニトロセルロース膜14c上に検出試薬及び対照試薬を線状に塗布し、固定させる(検出部材14の形成)。
(4)採取部材10、保持部材12及び第1の支持体18aを、透明接着フィルム(第2の支持体18b)で接着する。さらに、採取部材10、保持部材12及びニトロセルロース膜14cを、紙製の接着テープ(第1の接着部材20a)により接着する。
(5)第1の支持体18aと、セルロースからなる吸収部材16とを、透明接着フィルム(第2の支持体18b)で接着する。さらに、その第2の支持体18b、吸収部材16及びニトロセルロース膜14cを、紙製の接着テープ(第2の接着部材20b)により接着する。
(6)第1の支持体18a、第2の支持体18b及び第2の接着部材20bに、事務用シール紙(背景部材22)を接着する。
(7)このようにして形成した多層構造カードを、幅1.5mmのストリップ状に切断する。
図1に示す検出装置を用いて涙液の採取を行った。採取部材10及び保持部材12が共有する単一の繊維基材の下流側が、検出部材14の上流側と1mmの長さで重なり合っており、金コロイドで標識した抗体溶液(OD520=8)が22μL/cmの量で繊維基材の下流側の端部に約2.5mmの長さで塗布された検出装置を用意した。被検者がドライアイを患う場合には、検出に充分な量の涙液を採取する時間(涙が出てくるまでの時間)がかかったために、対照試薬固定部に赤いラインが現れるまでに10分以上要したが、被検者が負担を感じることなく、涙液を採取することができた。このことから、図1に示す検出装置を用いれば、被検者に負担を与えることなく、検出に充分な量の涙液を被検者から直接採取できることが明らかとなった。
上記の検出装置を一ヶ月放置した。その結果、検出装置は縒れたり曲がったりすることなく、構造を維持していた。このことから、図1に示す検出装置は、構造上の耐久性を充分に有することが明らかとなった。
上記の検出装置に、クリップ等を付加することにより、荷重を変えて涙液の採取を行った。その結果、クリップ等が付加された検出装置は、全体の荷重が0.8gを超えた場合に、被験者の下結膜円蓋から落下した。このことから、本実施例の検出装置の許容荷重は0.8g以下であることが明らかとなった。
以下の8種の繊維基材(A)~(H)の保水力について、次のように試験を行った。
(A)キノクロスKS-40(王子キノクロス社):木材パルプ不織布
(B)パルクロスP-40(王子キノクロス社):レーヨン配合木材パルプ不織布
(C)パルクロスPB-40P(王子キノクロス社):レーヨン配合木材パルプ不織布
(D)ハイクロスHAZ-40(王子キノクロス社):合成繊維配合木材パルプ不織布
(E)ハイクロスA-40(王子キノクロス社):合成繊維配合木材パルプ不織布
(F)ワットマンNo.41濾紙(ワットマンジャパン社):綿繊維を原料とする濾紙
(G)Accuwick Ultra(日本ポール社):ヒドロキシポリエステル
(H)S14(ワットマンジャパン社):グラスファイバー
(式) (保水力I)=(b)/(a)
(式) (保水力II)=(c)/(a)
上記8種の繊維基材(A)~(H)について、標識試薬保持能力を、金コロイドで標識した抗体溶液を滴下したときに生じるスポットの広がり(スポットの直径)によって評価した。
上記8種の繊維基材(A)~(H)の吸水速度について、繊維製品の吸水試験方法であるバイレック法に基づき試験を行った。
木材パルプ不織布(B)及び(C)よりも吸水速度が速いことが明らかとなった。なお、濾紙(F)、ヒドロキシポリエステル(G)及びグラスファイバー(H)においては、繊維基材片の全体が吸水状態となったため正確な値は得られなかったが、木材パルプ不織布と比べて顕著に吸水速度が速いことが示された。
上記繊維基材(A)~(H)の構造について、断面の走査型電子顕微鏡(SEM)写真を撮影することにより評価した。図4は、繊維基材(A)~(H)の断面の走査型電子顕微鏡(SEM)写真である。
(1)圧縮された繊維基材による検出時間短縮効果
採取部材として、下記2種いずれかの木材パルプ不織布を用いた検出装置をそれぞれ用意した。なお、各検出装置には、標識試薬として、金コロイドで標識した抗体溶液(OD520=16)を10μL/cm塗布した。
・「キノクロスKS-40」(王子キノクロス社):厚さ平均1.03mm(最小値0.85~最大値1.15mm)、密度39.3mg/cm3
・「KS-40プレス品」:圧縮率36.9%:厚さ平均0.65mm(最小値0.5~最大値0.75mm)、密度58.9mg/cm3
圧縮率(%)=100-(「KS-40プレス品」の厚さ平均/「キノクロスKS-40」の厚さ平均)×100
密度(mg/cm3)=平均質量(mg)/[2(cm)×2(cm)×厚さ平均(cm)]
・試料1:生理食塩水(大塚製薬(株)製)、総IgE濃度0(IU/mL)
・試料2:総IgE濃度8.73(IU/mL)
・試料3:総IgE濃度34.05(IU/mL)
採取部材10及び保持部材12が一体化した図1に示す検出装置において、採取部材10及び保持部材12が共有する単一の繊維基材の下流側が、検出部材14の上流側と1~5mmの異なる長さで重なり合っている5種の検出装置を用意した。上記繊維基材としては「キノクロスKS-40」(王子キノクロス社)を用い、金コロイドで標識した抗体溶液(OD520=8)を22μL/cmの量で繊維基材の下流側の端部に塗布することにより、上記端部に約3mmの長さの保持部材12が形成されたものを用いた。
・試料1:生理食塩水(大塚製薬(株)製)、総IgE濃度0(IU/mL)
・試料2:総IgE濃度8.73(IU/mL)
・試料3:総IgE濃度34.05(IU/mL)
Claims (30)
- 液体試料中の被検出物質を検出するストリップ形状の検出装置であって、
生体から前記液体試料を直接採取する採取部材と、
前記被検出物質と特異的に結合する標識試薬を含み、該標識試薬が前記液体試料の移動と共に移動することができる状態で保持されている保持部材と、
前記被検出物質と特異的に結合することにより前記被検出物質と前記標識試薬との結合体を捕捉する検出試薬を含み、該検出試薬が固定されている検出部材と、
前記液体試料を吸収可能な吸収部材と、
液不透過性の支持部材と、を備え、
前記採取部材、前記保持部材、前記検出部材及び前記吸収部材は、これらの部材の中を前記液体試料が毛細管現象によりこの順序で移動するように、前記支持部材上で前記検出装置の長手方向に配列されており、
前記採取部材が、前記液体試料の移動方向における上流側に、前記支持部材からはみ出して突出する突出部分を含む、検出装置。 - 前記保持部材が前記検出部材の一部と重なり合う部分を有し、その重なり合う部分の長手方向に沿った長さが、前記保持部材のうち前記標識試薬が保持されている部分の長手方向に沿った長さ以上である、請求項1記載の検出装置。
- 前記採取部材及び前記保持部材が単一の繊維基材を共有し、前記繊維基材の前記移動方向における下流側の端部に前記標識試薬が保持されることにより前記保持部材が形成されている、請求項1記載の検出装置。
- 前記重なり合う部分の長手方向に沿った長さが、前記保持部材のうち前記標識試薬が保持されている部分の長手方向に沿った長さより長い、請求項2又は3記載の検出装置。
- 前記採取部材がパルプを含む不織布である、請求項1又は2記載の検出装置。
- 前記繊維基材がパルプを含む不織布である、請求項3又は4記載の検出装置。
- 前記パルプは、木材パルプである、請求項5又は6に記載の検出装置。
- 前記不織布に、レーヨンが配合されている、請求項5~7のいずれか一項に記載の検出装置。
- 前記不織布に、合成繊維が配合されている、請求項5~8のいずれか一項に記載の検出装置。
- 前記不織布が、圧縮された不織布である、請求項5~9のいずれか一項に記載の検出装置。
- 前記不織布の密度が40mg/cm3以上である、請求項10記載の検出装置。
- 前記不織布の厚さが0.8mm以下である、請求項10又は11記載の検出装置。
- 前記不織布が、10%以上の圧縮率で圧縮された不織布である、請求項10~12のいずれか一項に記載の検出装置。
- 前記不織布の密度が45mg/cm3以上である、請求項10~13のいずれか一項に記載の検出装置。
- 前記不織布の厚さが0.75mm以下である、請求項10~14のいずれか一項に記載の検出装置。
- 前記不織布が、20%以上の圧縮率で圧縮された不織布である、請求項10~15のいずれか一項に記載の検出装置。
- 前記採取部材、前記保持部材及び前記検出部材の、前記長手方向に直交する方向における最大幅が0.8mm~3mmである、請求項1~16のいずれか一項に記載の検出装置。
- 前記検出部材が、前記標識試薬と特異的に結合する対照試薬を更に含み、前記対照試薬が前記検出試薬よりも前記下流側に固定されている、請求項1~17のいずれか一項に記載の検出装置。
- 前記突出部分の長さが5mm以上である、請求項1~18のいずれか一項に記載の検出装置。
- 前記採取部材の前記下流側の端部、前記保持部材、及び前記検出部材の前記上流側の端部の、前記支持部材とは反対側の表面に接着する第1の接着部材を更に備え、その第1の接着部材は、前記表面に接着する接着面とは反対側に非接着面を有する、請求項1~19のいずれか一項に記載の検出装置。
- 前記検出部材の前記下流側の端部、前記吸収部材、及び前記支持部材の前記下流側の端部を挟み込むように接着する第2の接着部材を更に備え、その第2の接着部材は、前記各部材に接着する接着面とは反対側に非接着面を有する、請求項1~20のいずれか一項に記載の検出装置。
- 前記支持部材が、前記検出部材の裏打ちを兼ねる第1の支持体と、前記第1の支持体の前記検出部材とは反対側に設けられた第2の支持体と、を含む、請求項1~21のいずれか一項に記載の検出装置。
- 前記第2の支持体が、前記第1の支持体と重なる部分で前記長手方向に分離している、請求項22記載の検出装置。
- 前記支持部材が、前記標識試薬による捕捉発色を強調する機能を有する、請求項1~23のいずれか一項に記載の検出装置。
- 前記支持部材の前記検出部材とは反対側に、前記標識試薬による捕捉発色を強調する機能を有する背景部材を更に備える、請求項1~23のいずれか一項に記載の検出装置。
- 前記背景部材が前記支持部材側に接着面を有する紙製のテープであって、
前記支持部材が前記背景部材よりも前記上流側に2mm以上延在する、請求項25記載の検出装置。 - 質量が0.8g以下である、請求項1~26のいずれか一項に記載の検出装置。
- 前記生体がヒトであり、前記液体試料が涙液である、請求項1~27のいずれか一項に記載の検出装置。
- 前記被検出物質がIgE抗体であり、前記標識試薬がIgE抗体を抗原とする抗体を標識物質により標識したものであり、前記検出試薬は前記標識試薬が有する抗体とは異なる認識部位を含む、IgE抗体を抗原とする抗体であり、前記対照試薬は前記標識試薬が有する抗体を抗原とする抗体である、請求項1~28のいずれか一項に記載の検出装置。
- 請求項1~29のいずれか一項に記載の検出装置を用いて、液体試料中の被検出物質を検出する、検出方法。
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CA2758152A1 (en) | 2010-10-14 |
US20120095308A1 (en) | 2012-04-19 |
US9046518B2 (en) | 2015-06-02 |
EP2418485A4 (en) | 2013-04-10 |
CN102388309B (zh) | 2016-05-25 |
EP2418485A1 (en) | 2012-02-15 |
AU2009343906B2 (en) | 2013-07-04 |
CN102388309A (zh) | 2012-03-21 |
CA2758152C (en) | 2015-01-13 |
SG175126A1 (en) | 2011-11-28 |
KR20120024589A (ko) | 2012-03-14 |
ES2582784T3 (es) | 2016-09-15 |
KR101422904B1 (ko) | 2014-08-13 |
EP2418485B1 (en) | 2016-06-22 |
AU2009343906A1 (en) | 2011-11-24 |
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