WO2010043074A1 - 流体检测试片及其测试方法 - Google Patents

流体检测试片及其测试方法 Download PDF

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Publication number
WO2010043074A1
WO2010043074A1 PCT/CN2008/001747 CN2008001747W WO2010043074A1 WO 2010043074 A1 WO2010043074 A1 WO 2010043074A1 CN 2008001747 W CN2008001747 W CN 2008001747W WO 2010043074 A1 WO2010043074 A1 WO 2010043074A1
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WO
WIPO (PCT)
Prior art keywords
fluid
antibody
zone
nitrocellulose
region
Prior art date
Application number
PCT/CN2008/001747
Other languages
English (en)
French (fr)
Inventor
吴怡荏
谢治纬
谢文彬
Original Assignee
红电医学科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 红电医学科技股份有限公司 filed Critical 红电医学科技股份有限公司
Priority to NZ591986A priority Critical patent/NZ591986A/en
Priority to ES08877351T priority patent/ES2429113T3/es
Priority to CA2740514A priority patent/CA2740514A1/en
Priority to BRPI0823169-9A priority patent/BRPI0823169A2/pt
Priority to CN2008801313576A priority patent/CN102171364A/zh
Priority to AU2008362975A priority patent/AU2008362975B2/en
Priority to KR1020117008111A priority patent/KR101252953B1/ko
Priority to JP2011531320A priority patent/JP2012505417A/ja
Priority to PCT/CN2008/001747 priority patent/WO2010043074A1/zh
Priority to EP08877351.0A priority patent/EP2339019B1/en
Priority to RU2011118609/10A priority patent/RU2477754C2/ru
Priority to US12/431,915 priority patent/US8133718B2/en
Publication of WO2010043074A1 publication Critical patent/WO2010043074A1/zh

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/53Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/543Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
    • G01N33/54366Apparatus specially adapted for solid-phase testing
    • G01N33/54386Analytical elements
    • G01N33/54387Immunochromatographic test strips
    • G01N33/54388Immunochromatographic test strips based on lateral flow
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/53Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/558Immunoassay; Biospecific binding assay; Materials therefor using diffusion or migration of antigen or antibody
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/53Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/543Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12QMEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q1/00Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
    • C12Q1/26Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving oxidoreductase
    • C12Q1/28Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving oxidoreductase involving peroxidase
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/53Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/536Immunoassay; Biospecific binding assay; Materials therefor with immune complex formed in liquid phase
    • G01N33/537Immunoassay; Biospecific binding assay; Materials therefor with immune complex formed in liquid phase with separation of immune complex from unbound antigen or antibody
    • G01N33/539Immunoassay; Biospecific binding assay; Materials therefor with immune complex formed in liquid phase with separation of immune complex from unbound antigen or antibody involving precipitating reagent, e.g. ammonium sulfate
    • G01N33/541Double or second antibody, i.e. precipitating antibody
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/08Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor using a stream of discrete samples flowing along a tube system, e.g. flow injection analysis
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S435/00Chemistry: molecular biology and microbiology
    • Y10S435/817Enzyme or microbe electrode
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S435/00Chemistry: molecular biology and microbiology
    • Y10S435/97Test strip or test slide
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S435/00Chemistry: molecular biology and microbiology
    • Y10S435/975Kit
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S436/00Chemistry: analytical and immunological testing
    • Y10S436/807Apparatus included in process claim, e.g. physical support structures
    • Y10S436/808Automated or kit
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S436/00Chemistry: analytical and immunological testing
    • Y10S436/823Immunogenic carrier or carrier per se

Definitions

  • the present invention relates to a fluid test strip, and more particularly to a fluid test strip for quantitative detection. Background technique
  • Another way is to use the specificity of the immune molecule to measure specificity, such as the traditional enzyme linked iraraunolsorbent assay (ELISA), mostly in a 96-well plate. Operate, and by detecting the signal from the final enzyme reaction, push back the concentration of the substance to be tested. However, due to this test, in order to avoid non-specific binding of the immune molecule to other impurities contained in the analyte, it is necessary to add a washing step at each reaction stage, so that the analyte or other immune molecule is not detected. The bound reagents are removed from the 96-well plate to avoid false positive signals caused by excessive enzymes remaining in each well, resulting in a test failure.
  • This type of immunoassay has the advantages of high specificity and sensitivity.
  • test strips having the micro-channel structure have been used for immunodetection, simplifying the cumbersome process of cleaning in the above-mentioned conventional test methods after each step.
  • the currently known test strips still need to add the reagents required for the reaction reagent or reaction to the test piece in an additional manner when detecting.
  • the reagent or the substrate is separated from the test piece and stored in the detection.
  • the method is based on the reagent or substrate required for the test. It cannot be stored for a long time at room temperature and needs to be stored in a specific environment. (eg refrigerated or protected from light) to avoid test errors due to deterioration of the reactants.
  • a fluid detecting test piece having a flow path or a micro flow path structure is known. Since the flow path is not a water absorbing material, and the fluid to be tested is a composition having a high viscosity such as protein or sugar, it is to be treated. After the fluid is measured, it will remain on the flow channel, so that the fluid to be tested cannot be completely reacted. This will not only cause waste of the fluid to be tested, but also cause errors in the final test results.
  • a fluid detecting test piece having a micro flow path structure uses a capillary phenomenon generated by a micro flow path structure to transfer a fluid through a flow path to a reaction detecting area in a fluid transfer manner;
  • the fluid driving force is given by means of pressurization or the like, so that the fluid can actively pass through the flow path to reach the reaction detecting area.
  • the fluid to be tested is often injected into the flow path to cause bubbles of different sizes to block the flow path, causing an actual measurement error or even causing the test to fail.
  • the present invention provides a fluid detecting test piece comprising a substrate having a flow path.
  • the flow path is provided with a first fluid zone, a second fluid zone and a third fluid zone which are sequentially connected, wherein the first fluid zone is for the injection of fluid.
  • the flow path has a first antibody, a saccharide material, a peroxide, a second antibody, and a substrate reaction reagent.
  • the first antibody is located in the first fluid zone for identifying the substance to be tested.
  • the saccharide material and the peroxide enthalpy are located in the first fluid zone or the second fluid zone.
  • the second antibody is fixed (immobil ized) in the second fluid zone, the same identification Qieyi test substance, and the second antibody and the first antibody is an antigenic determinant different from the identification position (epitope) 0 subject matter reagents are Located in the third fluid zone, containing cerium oxide.
  • the first antibody, the saccharide material and the peroxide are salted as the fluid flows, and part of the peroxide ⁇ is combined with the first antibody, the test substance and
  • the second antibody binds and remains in the second fluid zone, and the unbound peroxide oxime flows with the fluid to the third fluid zone, and the sugar oxidized salt catalyzes the oxidation of the saccharide material flowing to the third fluid zone.
  • hydrogen peroxide (0 2 ) is generated, and the hydrogen peroxide is reacted by a peroxide-picking reaction flowing to the third fluid region to generate an electrical signal.
  • Another object of the present invention is to provide a fluid detecting test piece in which the reagents and materials required for the reaction are retained in the test piece in a dry manner before the reaction, so that the test can be stored for a long period of time without causing deterioration due to deterioration of the reagent. error.
  • Another object of the present invention is to provide a fluid detecting test piece which can be combined with the existing electrochemical detecting technology, and has the advantages of short detection time, high specificity and good sensitivity.
  • the invention also provides a fluid detection and detection method, which mainly comprises the following steps. (1) Providing a fluid having a substance to be tested. (2) Providing a substrate, the substrate comprising at least a flow channel, wherein the flow channel comprises a first fluid zone, a second fluid zone and a third fluid zone connected in sequence, the first fluid zone being for fluid injection.
  • the substrate further comprises a first antibody located in the first fluid region for identifying the substance to be tested in the fluid; a saccharide material located in the first fluid region or the second fluid region; In the first fluid zone or the second fluid zone; the second antibody is fixed in the second fluid zone and also identifies the same substance to be tested, and the second antibody and the first antibody are different in identifying the antigenic determining position;
  • the chromogenic reagent is located in the third fluid zone, and the receptor is contained in the saccharide cerium oxide.
  • a further object of the present invention is to provide a fluid detecting method in which a reagent and a material required for the reaction are retained in a test piece in a dry manner before the reaction, so that the reagent can be stored for a long period of time without causing a test error due to deterioration of the reagent. .
  • a further object of the present invention is to provide a fluid detecting method which can be combined with the existing electrochemical detecting technology, and has the advantages of short detection time, high specificity and good sensitivity.
  • FIG. 1A is a schematic diagram of a fluid detecting test piece according to a first preferred embodiment of the present invention.
  • the fluid detecting test piece 1 includes a substrate 10 and an electrode layer 19.
  • the substrate 10 includes a flow path 11.
  • the flow path 11 is provided with a first fluid zone 111, a second fluid zone 112 and a third fluid zone 113 which are sequentially connected, wherein the first fluid zone 111 is an injection for the fluid.
  • FIG. 1B is a distribution of reactive materials in the flow path of the fluid detecting test piece according to the first preferred embodiment of the present invention.
  • the first fluid region 111 has a first antibody 1111, a saccharide material 1112, and a peroxide ⁇ 1113.
  • the second antibody region 112 has a second antibody 1121, and the second antibody 1121 is immobilized in the second antibody region 112.
  • the first antibody 1111 and the second antibody 1121 are both the same test substance 1101 in the identification fluid, but the first antibody 1111 and the second antibody 1121 are different identification sites on the test substance 1101.
  • the third fluid region 113 has a matrix reaction reagent 1132, and the substrate reagent reagent 1132 contains glucoside ruthenium 1133.
  • the peroxide ⁇ 1113 may be HRP (Horse Radsh Peroxidase) > Ascorbate Peroxidase (AP), or hydrogen peroxidase 0 in a preferred embodiment.
  • the saccharide material 1112 may be glucose, and at the same time, the glucoside ruthenium oxide 1133 is selected from glucosinolate.
  • FIG. 1C is a schematic diagram showing the distribution of the reaction materials in the flow path of the fluid detecting test piece in different reaction stages according to the first preferred embodiment of the present invention.
  • the first antibody 1111 recognizes and combines with the substance to be tested 1101.
  • the first antibody 1111, the saccharide material 1112, and the peroxide 1113 are not fixed in the first fluid region, the first antibody 1111 and the test substance 1101 bound to the first antibody 1111 are peroxidized.
  • the eagle 1113, and the saccharide material 1112 will continue to flow along the fluid to the second fluid zone 112.
  • the second antibody 1121 will bind to the substance to be tested 1101.
  • the first antibody 1111 which has been bound to the test substance 1101 and the peroxide above the first antibody 1111 are marinated 1113 - Leaving in the second fluid zone 112; the saccharide material 1112 which also flows to the second fluid zone 112 at this time will be followed by the first antibody 1111 and the peroxide 1113 which are not bound to the test substance 1101.
  • the fluid continues to flow to the third fluid zone 113.
  • the saccharide material 1112 and the peroxide ⁇ 1113 not in contact with the first antibody 1111, the second antibody 1112, and the test substance 1101 in the second fluid region 112 flow to the third fluid region. 113.
  • the saccharide material 1112 is oxidized with the sugar oxidized salt 1133 already present in the third fluid region 113 to generate hydrogen peroxide (3 ⁇ 40 2 ), and the generated hydrogen peroxide is subjected to the flow.
  • the peroxide chest 1113 of the three reaction zone 113 catalyzes to generate an electrical signal, and the electrical signals are transmitted from the electrodes and circuits of the electrode layer 19 for detection by the instrument.
  • the amount of hydrogen peroxide remaining after the reaction of the hydrogen peroxide generated in the third fluid region 113 through the peroxide ⁇ 1113 can be estimated, and
  • the content of both the saccharide material 1111 and the oxidized salt 1133 to be added is a known fixed value, so when the saccharide material 1111 flows with the fluid to the third fluid region 113 and the sugar
  • the total amount of hydrogen peroxide produced after the reaction of cerium oxide 1133 is also an inferior fixed value. Therefore, the final remaining hydrogen peroxide content estimated by the detected electrical signal strength and the predetermined total amount of hydrogen peroxide generated are the difference between the two in the third fluid region 113.
  • the content of hydrogen peroxide consumed by the oxide 1113 is measured, and the consumed hydrogen peroxide content is deduced to calculate the concentration of the peroxide ⁇ 1113 participating in the reaction, and the peroxide flowing to the third fluid region 113 is known. Marinate the amount of 1113.
  • the peroxide 1113 content to be added is also a known fixed value, so the concentration of the peroxide eagle 1113 remaining in the second fluid region 112 may also be It is estimated by simply subtracting both the "peroxide enthalpy 1113 total amount" and the "peroxide enthalpy content flowing to the third fluid region 113".
  • the concentration of the test substance 1101 contained in the fluid can be further calculated to achieve the purpose of quantitative detection.
  • the binding form of the first antibody 1111 and the peroxide thorax 1113 may be direct formation of conjugation; or the first antibody 1111 is conjugated to biotin (Biotin), and The peroxide ⁇ 1113 is conjugated to avidin (Avidin), and the biotin and avidin are strongly combined to form a complex of AB complex, so that when the reaction is carried out, when there is a first antibody 1111 When left in the second fluid zone 112, a portion of the peroxide salt 1113 is also retained in the second fluid zone 112.
  • the above avidin may be Avidin, Streptavidin, or NeutrAvidin.
  • FIG. IF to FIG. 1H as a schematic diagram showing other modes of distribution of the reaction materials in the flow path of the fluid detecting test piece according to the first preferred embodiment of the present invention.
  • the distribution of the saccharide material 1112 and the peroxide chest 1113 in the fluid detecting test piece 1 in the flow path 11 is distributed in the first flow path 111 except as shown in FIG. 1B. In addition to the manner, it may also be distributed in the second flow path 112.
  • the first antibody 1111 and the peroxidation chest 1113 are located in the first fluid region 111, and the saccharide material 1112 is located in the second fluid region 112. At this time, the first antibody 1111 and the peroxide chest 1113
  • the binding mode of the two is combined with the above direct conjugation, or the combination of biotin and avidin is used to form a complex.
  • the first antibody 1111 and the peroxide salt 1113 are each combined with biotin. There is a way with avidin.
  • the remaining reaction material in the flow channel 11 is a second antibody 1121, a substrate reaction reagent 1132, and a sugar oxidation salt 1133. The distribution is the same as in Figure IB.
  • the first antibody 1111 is located in the first fluid zone 111 and the peroxylized salt 1113 and the carbohydrate material 1112 are located in the second fluid zone 112.
  • the first antibody 1111 and the saccharide material 1112 are located in the first fluid region 111
  • the peroxidized salt 1113 is located in the second fluid region 112.
  • the remaining reaction material second antibody 1121, the receptor reaction reagent 1132, and the sugar ruthenium oxide 1133 in the flow channel 11 are distributed in the same manner as in FIG. 1B, and the flow distribution of the reaction material in each subsequent reaction stage
  • the reaction performed is shown in FIG. 1C to FIG. 1E, and the detailed description thereof will not be repeated here.
  • FIG. 1A is a cross-sectional view along line M of Figure 1A.
  • a fibrous layer 1110 is contained at the bottom of the first fluid zone 111, and a first antibody (1111, FIG. 1B) is formed in the fibrous layer 1110 such that after the fluid is injected into the first fluid zone 111, The first antibody (1111, Figure 1B) will flow with the fluid to the second fluid zone 112.
  • the second nitrocellulose layer 1120 and the third nitrocellulose layer 1130 are each provided at the bottom of the second fluid zone 112 and the third fluid zone 113.
  • the second antibody (1121, Fig. 1B) is immobilized in the second nitrocellulose layer 1120, and the host reaction reagent (1132, Fig. 1B) is formed in the third nitrocellulose layer 1130.
  • the second nitrocellulose layer 1120 and the third nitrocellulose layer 1130 may be laid in the form of a layer of nitrocellulose membrane (NC membrane) at the bottom of the second fluid zone 112 and the third fluid zone 113.
  • NC membrane nitrocellulose membrane
  • the nitrocellulose solution can be cast in the second fluid zone 112 and the bottom of the third fluid zone 113 by casting, and then subjected to air drying or freeze drying steps. This each forms a second nitrocellulose layer 1120 and a third nitrocellulose layer 1130 having a hollow network configuration. Further, in order to reduce the influence of the capillary action between the flow path and the fluid, such a flow path formed by casting is not a so-called micro flow path known in the art, and the second fluid region 112 and the third fluid region
  • the minimum width of 113 is preferably 0.3 ram, and the substrate 10 can be made of a biocompatible material.
  • the surface roughness of the flow path 11 is preferably in the range of 3 to 50 microns, and the average thickness of the second nitrocellulose layer 1120 is equal to the thickness of the third nitrocellulose layer 1130.
  • the flow path 11 may further include a fourth fluid zone (not shown), the bottom of which is also formed with a layer of nitrocellulose for storage of excess fluid, and the nitrocellulose layer has a hollow network configuration.
  • the above nitrocellulose solution is prepared by mixing a nitrocellulose powder with a solvent containing an ester and a ketone, and a preferred volume ratio of the nitrocellulose powder to an ester and a ketone solvent is 1:9. Again, in this way, after the second nitrocellulose layer 1120 and the third nitrocellulose layer 1130 are dried; the second antibody 1121 is injected into the second nitrocellulose layer 1120 as a solution, and then air-dried or frozen. In the drying process, the second antibody 1121 is retained in the powdered form in the second nitrocellulose layer 1120.
  • the second antibody 1121 may be injected as a solution into the previously prepared nitrocellulose solution. After mixing uniformly, it is poured into the bottom of the second fluid zone 112, and then air-dried or freeze-dried, while the nitrocellulose solution forming second nitrocellulose layer 1120 and the second antibody 1121 are retained in a powder form.
  • the manner in which the receptor reaction reagent 1132 is formed in the third nitrocellulose layer 1130 is also substantially the same as the manner in which the second antibody 1121 is formed on the second nitrocellulose layer 1120, and the third nitrocellulose layer 1130 can be formed first.
  • the reagent is further injected and dried, or mixed with the nitrocellulose solution and injected into the bottom of the third fluid region 113 to form a dry form. Therefore, the description thereof will not be repeated here.
  • the present invention also provides a fluid detecting method, as described in the following second preferred embodiment, wherein the detecting test piece used in the detecting method has the structural features and the In the preferred embodiment, the description is not repeated, and the detection test piece component number mentioned therein is referred to FIG. 1B to FIG.
  • FIG. 2 is a schematic flow chart of a fluid detecting method according to a second preferred embodiment of the present invention.
  • the fluid detection method 2 includes the following steps:
  • Step 21 Provide a fluid containing the substance to be tested 1101, please refer to Figure 1B.
  • Step 22 Providing a substrate 10 comprising at least a flow channel 11.
  • the flow path 11 includes a first fluid zone 111, a second fluid zone 112, and a third fluid zone 113 that are sequentially connected, and the first fluid zone 111 is for the injection of a fluid.
  • the first fluid region 111 has a first antibody 1111 therein.
  • the second antibody region 112 has a second antibody 1121, and the second antibody 1121 is immobilized in the second antibody region 112. Further, the first antibody 1111 and the second antibody 1121 are both the same test substance 1101 in the identification fluid, but the first antibody 1111 and the second antibody 1121 are each different in determining the antigen-determining position on the test substance 1101.
  • the third fluid region 113 has a matrix reaction reagent 1132, and the substrate reagent reagent 1132 contains a sugar oxidized chest 1133.
  • the peroxide ⁇ 1113 may be horseradish peroxide ⁇ , ascorbate peroxide or hydrogen peroxide chest.
  • the saccharide material 1112 can be glucose, and at the same time, the glucoside bismuth oxide 1133 is selected. It is oxidized with glucose.
  • various distributions of the saccharide material 1112 and the peroxide ⁇ 1113 in the flow path 11 are as described in the first preferred embodiment (please refer to FIG. 1B, FIG. 1F, FIG. 1G, and FIG. 1H).
  • Step 23 A fluid is applied to the first fluid zone 111 of the flow path 11.
  • the fluid will sequentially flow from the first fluid region 111 to the third fluid region 112 along the flow path 11 to the third fluid region 113, and the first antibody 1111 and the saccharide material 1112 present in the flow channel 11 And peroxide marinated 1113 as the fluid flows.
  • Step 24 The test substance 1101 will flow with the fluid to the second fluid region 112, and the test substance 1101 is combined with the first antibody 1111, the second antibody 1121 and a portion of the peroxide ⁇ 1113 and left together in the second fluid region. 112.
  • the fluid continues to flow to the third fluid zone 113 with the carbohydrate material 1112, the unbound primary antibody 1111, and the peroxide chest 1113.
  • the saccharide material 1112 is oxidized by the saccharide cerium oxide 1133 to produce hydrogen peroxide (0 2 ).
  • the hydrogen peroxide is catalyzed and reacted by the peroxide ⁇ 1113 flowing to the third fluid region 113, and generates an electrical signal, and the electrical signals are transmitted from the electrodes and circuits of the electrode layer 19 for detection by the instrument.
  • Step 25 Detect the electrical signal generated by step 24. At this time, by detecting the intensity of the electrical signal, the amount of hydrogen peroxide remaining after the reaction of the hydrogen peroxide generated in the third fluid region 113 through the peroxide-halogen 1113 can be estimated, and When the fluid test strip 1 is produced, the content of both the saccharide material 1111 and the oxidized salt 1133 to be added is a known fixed value, so that the saccharide material 1111 flows with the fluid to the third fluid region 113 and the sugar. The total amount of hydrogen peroxide produced after the oxidation of the 1133 reaction is also a predictable fixed value.
  • the final remaining hydrogen peroxide content estimated by the detected electrical signal strength and the predetermined total amount of hydrogen peroxide generated are the difference between the two in the third fluid region 113.
  • the hydrogen peroxide content consumed by the oxide 1113 is calculated by decomposing the consumed hydrogen peroxide content into the known concentration of the peroxide ⁇ 1113 participating in the reaction, and the peroxide eagle flowing to the third fluid region 113 is known. The amount of 1113.
  • the content of the peroxide ⁇ 1113 to be added is also a known fixed value, so the concentration of the peroxide ⁇ 1113 remaining in the second fluid region 112 may also be It is estimated by simply subtracting both the "peroxide chest 1113 total amount" and the "peroxide enthalpy content flowing to the third fluid region 113".
  • the concentration of the test substance 1101 contained in the fluid can be further calculated by using the calculated concentration of the peroxide chest 1113 remaining in the second fluid region 112 to achieve the purpose of quantitative detection.
  • the combination of the first antibody 1111 and the peroxide ⁇ 1113 and the preferred type, the structural composition of each fluid region, the configuration of the nitrocellulose layer, the formation manner, and the nitrification used The composition and the preferred ratio of the fiber solution, the composition and the formation manner of each of the reaction materials are the same as those of the first preferred embodiment described above, and the detailed description thereof will not be repeated here.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
  • the above description should be understood and implemented by those skilled in the art, and thus the other embodiments are not disclosed. Equivalent changes or modifications made under the spirit shall be included in the scope of the following patent application. Brief description of the drawings
  • Fig. 1A is a schematic view showing a fluid detecting test piece according to a first preferred embodiment of the present invention.
  • 1B is a schematic view showing the distribution of reactive materials in a flow path of a fluid detecting test piece according to a first preferred embodiment of the present invention.
  • 1C to 1E are schematic diagrams showing the distribution of reactive materials in different reaction stages in a flow path of a fluid detecting test strip according to a first preferred embodiment of the present invention.
  • FIGS. 1F to 1H are schematic views showing other manners of distribution of reactive materials in a flow path of a fluid detecting test piece according to a first preferred embodiment of the present invention.
  • Figure II is a cross-sectional view showing a fluid detecting test piece according to a first preferred embodiment of the present invention.
  • FIG. 2 is a flow chart showing a fluid detecting method according to a second preferred embodiment of the present invention.

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Description

流体检测试片及其测试方法 技术领域
本发明是关于一种流体检测试片, 特别是一种有关于用于定量检测的流体检测 试片。 背景技术
在生物检体的定量的已知技术中, 在进行生化检测时, 常利用特定酵素与待测 物质进行反应, 再针对反应所产生的产物其化学或电学特性进行侦测, 例如: 在溶氧 电极上固定葡萄糖氧化嗨(glucose oxidase), 利用葡萄糖氧化嗨与血糖(glucose) 反应产生的过氧化氢所造成的电位或是电流改变,来测定所生成的过氧化氢浓度, 并 推算出检体中血糖浓度。 由于此种电化学检验方法只要微量的过氧化氢存在, 即可造 成电位或电流的改变, 故所需的检体体积极少, 且侦测速度快。但此种测量方式由于 需要适当的酵素配合以产生便于侦测的过氧化物,故目前仅适用于小分子的定量量测 上, 例如血糖、 总胆固醇、 尿素、 肌酸酐等。
另一种方式则是利用免疫分子具有专一性辨识能力的特定来进行测量, 例如传 统的酵素连结免疫吸附测试 (enzyme linked iraraunolsorbent assay, ELISA), 多在 96孔盘 (96- well plate) 中操作, 并通过侦测最终酵素反应所发出的信号, 回推待 测物质的浓度。但是由于此种测试, 为了要避免免疫分子与待测物中包含的其他杂质 进行非专一性结合,所以必须在各个反应阶段加入清洗的步骤,藉以将未与待测物或 是其他免疫分子结合的反应试剂自 96孔盘中清除, 以免造成过多的酵素留置于各孔 位 (well ) 中所造成的伪阳性信号, 导致测试失败。 此种免疫测量方式具有专一性 ( specificity) 高及灵敏度 ( sensitivity)佳等优点。
由于机电技术的发展, 已有利用具有微流道结构的测试试片进行免疫侦测, 简 化上述传统测试方法中于各步骤后进行清洗等繁琐流程。然目前已知的测试试片,在 进行侦测时仍需将反应试剂或反应所需的受质 (substrate ) 以额外添加的方式加入 测试试片中。此种反应试剂或受质与检测试片分离存放, 于侦测时再行添加的方式乃 是起因于其所需的反应试剂或受质,在室温中无法长期存放,需保存于特定环境中(如 冷藏或避光保存), 以避免因反应物变质所导致的测试误差。 故此种免疫检测试片在 操作及保存上仍多有所不便。 此外已知具有流道或微流道结构的流体检测试片, 因流道周围并非吸水材质, 且待测流体多为含有如蛋白质或是醣类等黏滞度高的组成物, 所以当待测流体流过 后, 会在流道上残留, 使得待测流体无法完全反应, 如此一来, 不仅造成待测流体的 浪费, 更可能造成最终测试结果的误差。
此外, 已知具有微流道结构的流体检测试片在流体传送方面, 则是利用微流道结构产 生的毛细现象, 将流体经过流道被动传送至反应侦测区域; 另一种方式则是在注入待 测流体时即利用加压等方式, 给予流体驱动力, 使得流体可主动通过流道, 到达反应 侦测区域。但是无论是上述任一种方式, 待测流体注入流道后常常产生大小不一的气 泡使得流道阻塞, 造成实际测量上的误差, 甚至致使测试失败。 发明内容
为克服上述缺点, 本发明提供一种流体检测试片, 包含有具有流道的基板。 流 道上设置有依序连接的第一流体区、第二流体区与第三流体区, 其中第一流体区是供 流体的注入。 此外, 流道中具有第一抗体、 醣类材料、 过氧化物腾、 第二抗体与受质 反应试剂。 第一抗体位于第一流体区中, 用于辨识待测物质。 醣类材料及过氧化物嗨 则位于第一流体区或第二流体区中。 第二抗体则是固定(immobil ized)于第二流体区 中, 且亦辨识同一待测物质, 又第二抗体及第一抗体是辨识相异的抗原决定位置 (epitope) 0 受质反应试剂是位于第三流体区中, 包含有醣氧化嗨。 藉此, 当包含有 待测物质的流体注入流道后, 第一抗体、 醣类材料及过氧化物腌是随着流体流动, 部 分的过氧化物嗨会与第一抗体、待测物质及第二抗体结合并留置于第二流体区中, 未 结合的过氧化物嗨则随流体流至该第三流体区,且醣氧化腌会催化流至第三流体区的 醣类材料进行氧化反应, 并产生出过氧化氢 ( 02), 且过氧化氢会受到流至第三流体 区的过氧化物腌催化进行反应, 并产生电学信号。
因此, 本发明的主要目的, 是提供一种流体检测试片, 由于具有所有反应所需 的试剂及材料, 无须经由繁琐的操作步骤即可直接测量最终反应信号进行定量侦测。
本发明的另一目的, 是提供一种流体检测试片, 其中反应所须的试剂与材料, 在反应前是以干燥方式留存于试片中, 故可长期保存, 不致因试剂变质而导致测试误 差。
本发明的另一目的, 是提供一种流体检测试片, 可配合现有的电化学侦测技术, 兼具有侦测时间短、 专一性高及灵敏度佳等优点。 本发明还提供一种流体检测检测方法, 主要包含下列步骤。 (1)提供具有待测物 的流体。 (2)提供基板, 基板包含至少流道, 而流道包含依序连接的第一流体区、 第 二流体区与第三流体区,第一流体区是供流体的注入。基板上进一步包含有第一抗体, 位于第一流体区中, 用于辨识该流体内的该待测物质; 醣类材料, 位于第一流体区或 第二流体区中; 过氧化物腌, 位于第一流体区或第二流体区中; 第二抗体, 固定于第 二流体区中, 且亦辨识同一待测物质, 而第二抗体及第一抗体是辨识相异的抗原决定 位置; 以及受质反应试剂, 位于第三流体区中, 受质反 试剂包含有醣氧化嗨。 (3) 将流体加至流道的第一流体区,使第一抗体、醣类材料及该过氧化物嗨随着流体流动。 (4)使待测物质与第一抗体、 第二抗体及部分的过氧化物胸结合并留置于第二流体区 中, 使流体带着醣类材料、 未结合的第一抗体及过氧化物嗨流至第三流体区, 使醣类 材料受到醣氧化腌的催化进行氧化反应, 并产生出过氧化氢, 过氧化氢会受到流至第 三流体区的过氧化物鹰催化进行反应, 并产生电学信号。 (5)侦测产生的电学信号。
因此, 本发明的另一目的, 是提供一种流体检测方法, 由于具有所有反应所需 的试剂及材料, 无须经由繁琐的操作步骤即可直接测量最终反应信号进行定量侦测。
本发明的再一目的, 是提供一种流体检测方法, 其中反应所须的试剂与材料, 在反应前是以干燥方式留存于试片中, 故可长期保存, 不致因试剂变质而导致测试误 差。
本发明的再一目的, 是提供一种流体检测方法, 可配合现有的电化学侦测技术, 兼具有侦测时间短、 专一性高及灵敏度佳等优点。 具体实施方式
由于本发明是揭露一种流体检测试片及其测试方法, 其中所利用化学原理及生 物检测技术, 已为相关技术领域具有通常知识者所能明了, 故以下文中的说明, 不再 作完整描述。 同时, 以下文中所对照的附图, 是表达与本发明特征有关的示意, 并没 有也不需要依据实际情形完整绘制, 事先叙明。
请参考图 1A, 为本发明的第一较佳实施例流体检测试片的示意图。 流体检测试 片 1包含有基板 10及电极层 19。基板 10包含有流道 11。流道 11上设置有依序连接 的第一流体区 111、 第二流体区 112与第三流体区 113, 其中第一流体区 111是供流 体的注入。
请继续参考图 IB, 为本发明第一较佳实施例流体检测试片流道中反应材料分布 示意图。 第一流体区 111中具有第一抗体 1111、 醣类材料 1112及过氧化物嗨 1113。 第二抗体区 112中具有第二抗体 1121, 而第二抗体 1121是固定在第二抗体区 112之 中。 并且, 第一抗体 1111与第二抗体 1121都是辨识流体中的同一种待测物质 1101, 但是第一抗体 1111与第二抗体 1121是各自辨识待测物质 1101上不同的抗原决定位 置。 所以在第一抗体 1111和第二抗体 1121的选用上, 两者均可为单株抗体 (mAb) 或多株抗体(pAb),只需要第一抗体 1111和第二抗体 1121是一组抗体配对(antibody pair), 在进行抗原辨识时, 不致发生互相干扰的状况即可。 第三流体区 113之中则 具有受质反应试剂 1132, 受质反应试剂 1132包含有醣氧化嗨 1133。其中, 过氧化物 嗨 1113可以是辣根过氧化物胸(HRP, Horseradish Peroxidase) > 抗坏血酸过氧化物 腌 (AP, Ascorbate Peroxidase)或是过氧化氢嗨 (hydrogen peroxidase) 0 在较佳的 实施状态中, 醣类材料 1112可为葡萄糖, 于此同时, 醣氧化嗨 1133则是选用葡萄糖 氧化嗨。
请继续参考第 1C至图 IE,为本发明第一较佳实施例流体检测试片流道中反应材 料在不同反应阶段的分布示意图。 首先请参考图 1C, 当含有待测物质 1101的流体注 入流道 11之后, 第一抗体 1111会辨识到待测物质 1101, 并与其做结合。 此外, 由 于第一抗体 1111、 醣类材料 1112及过氧化物腾 1113并未固定于第一流体区中, 所 以此时第一抗体 1111、 与第一抗体 1111结合的待测物质 1101、 过氧化物鹰 1113, 及醣类材料 1112会随着流体一起继续往第二流体区 112流动。
请继续参考图 ID, 当流体流至第二反应区 112之后,第二抗体 1121会与待测物 质 1101结合。 此时, 由于第二抗体 1121是固定在第二流体区 112之中, 所以会将已 经与待测物质 1101 结合的第一抗体 1111 以及在第一抗体 1111 之上的过氧化物腌 1113—并留置于第二流体区 112之中;而此时亦流至第二流体区 112的醣类材料 1112 则会和未与待测物质 1101结合的第一抗体 1111和过氧化物腌 1113则会随着流体继 续向第三流体区 113流动。
请继续参考图 1E, 醣类材料 1112和未与第一抗体 1111、 第二抗体 1112以及待 测物质 1101结合留置在第二流体区 112之中的过氧化物嗨 1113会流至第三流体区 113。 此时, 醣类材料 1112会与已经存在于第三流体区 113之中的醣氧化腌 1133进 行氧化反应, 产生出过氧化氢 (¾02), 而产生出的过氧化氢会受到流至第三反应区 113的过氧化物胸 1113进行催化, 产生电学信号, 利用电极层 19上电极及电路的将 电学信号传出以供仪器侦测。 此时, 可通过侦测电学信号的强度, 推算出第三流体区 113中产生出的过氧化 氢经过过氧化物旖 1113催化消耗之后, 反应完毕所剩余的过氧化氢的量, 又由于在 制作流体检测试片 1之时,要添加的醣类材料 1111与醣氧化腌 1133两者的含量均为 已知的固定值,故当醣类材料 1111随流体流至第三流体区 113与醣氧化嗨 1133反应 后所产生的过氧化氢其总量亦会是可推算的固定值。所以可通过所侦测到的电学信号 强度推算的最终剩余的过氧化氢含量与预定产生的过氧化氢总量,其两者之差即为在 第三流体区 113中被流至此区的过氧化物腌 1113所消耗的过氧化氢含量, 再将此被 消耗的过氧化氢含量推算出参与反应的过氧化物嗨 1113知浓度, 即可得知流至第三 流体区 113中过氧化物腌 1113的量。 再加上, 在制作流体捡测试片 1之时, 要添加 的过氧化物腌 1113含量也是已知的固定值, 所以留置于第二流体区 112之中的过氧 化物鹰 1113其浓度亦可通过「过氧化物嗨 1113总量」与「流至第三流体区 113的过 氧化物嗨含量」 两者简单相减后推算得知。 最后, 利用推算出的留置于第二流体区 112之中的过氧化物膺 1113的浓度, 可再推算出流体中所含有的待测物质 1101的浓 度, 以达到定量检测的目的。
在未反应前, 第一抗体 1111与过氧化物胸 1113两者的结合型态可以是直接形 成共轭结合(conjugation) ; 或是第一抗体 1111上共轭结合有生物素 (Biotin), 而 过氧化物嗨 1113则与亲和素 (Avidin)共轭结合, 利用生物素与亲和素会强力结合 成错合物 (AB complex) 的特性, 使得在进行反应时, 当有第一抗体 1111留置于第 二流体区 112时, 也会将部分的过氧化物腌 1113固定留置于第二流体区 112。 上述 的亲合素可以是卵白素(Avidin)、链霉亲合素(Str印 tavidin), 或是中性链亲和素 (NeutrAvidin)。
请继续参考图 IF至图 1H,为本发明第一较佳实施例流体检测试片流道中反应材 料其他方式分布示意图。为达成本发明的定量检测的目的, 流体检测试片 1中醣类材 料 1112及过氧化物胸 1113在流道 11中的分布方式除如图 1B所示的均存在于第一流 道 111的分布方式之外, 还可以分布在第二流道 112之中。
首先, 请参考图 1F, 第一抗体 1111和过氧化胸 1113位于第一流体区 111中, 而醣类材料 1112则位于第二流体区 112中,此时,第一抗体 1111与过氧化物胸 1113 两者的结合型态方式则与上述的直接共轭结合,或是利用生物素与亲和素结合成错合 物的特性,第一抗体 1111与过氧化物腌 1113各自以结合有生物素与亲和素的方式存 在。流道 11中其余的反应材料第二抗体 1121、受质反应试剂 1132,及醣氧化腌 1133 的分布方式则与图 IB中相同。采用此种分布的设置状态,在流体流过第二流体区 112 后, 醣类材料 1112—样会随着流体流至第三流体区 113, 故其后的各反应阶段中反 应材料的流动分布情形及所进行的反应则与图 1C至图 1E所示, 在此不再重复赘述。
请再参考图 1G, 此种分布设置下, 第一抗体 1111是位于第一流体区 111中, 而 过氧化腌 1113与醣类材料 1112则位于第二流体区 112中。 而在图 1H所代表的分布 方式, 则是第一抗体 1111与醣类材料 1112位于第一流体区 111、 过氧化腌 1113则 位于第二流体区 112 中。 流道 11 中其余的反应材料第二抗体 1121、 受质反应试剂 1132, 及醣氧化嗨 1133的分布方式则与图 1B中相同, 且其后的各反应阶段中反应材 料的流动分布情形及所进行的反应则与图 1C至图 1E所示, 在此不再重复赘述。
请继续参考图 II, 为图 1A沿 M联机的剖面示意图。 如图所示, 在第一流体区 111 的底部包含有纤维层 1110, 而第一抗体 (1111, 图 1B) 是形成于纤维层 1110 之中, 如此使得在流体注入第一流体区 111之后, 第一抗体 (1111, 图 1B) 会随流 体一起流至第二流体区 112。 而在第二流体区 112与第三流体区 113的底部各自具有 第二硝化纤维层 1120与第三硝化纤维层 1130。 第二抗体(1121, 图 1B)是固定于第 二硝化纤维层 1120之中, 而受质反应试剂 (1132, 图 1B) 是形成于第三硝化纤维层 1130中。
上述的第二硝化纤维层 1120与第三硝化纤维层 1130可以是以一层硝化纤维膜 (NC membrane)的形式铺设在第二流体区 112以及第三流体区 113的底部。
另一种较佳的制作形式, 则可以将硝化纤维溶液以浇注 (casting) 的方式, 浇 注在第二流体区 112以及第三流体区 113的底部, 再经过风干或是冷冻干燥的步骤, 藉此各自形成具有中空网状构型的第二硝化纤维层 1120与第三硝化纤维层 1130。 此 外, 为了降低流道与流体之间的毛细作用所造成的影响, 此种以浇注方式所制成的流 道并非已知技术所谓的微流道,且第二流体区 112与第三流体区 113的最小宽度较佳 为 0. 3 ram, 而基板 10则可采用生物兼容材料。 为达较佳的浇注效果, 流道 11的表 面粗糙度较佳范围 (Ra值) 在 3微米至 50微米之间, 而第二硝化纤维层 1120的平 均厚度等于第三硝化纤维层 1130厚度。 此外, 流道 11可进一步包括第四流体区(未 图示), 第四流体区的底部亦形成有硝化纤维层, 供多余流体的贮存, 且此硝化纤维 层具有中空网状构型。
上述的硝化纤维溶液是将硝化纤维粉末与包含有酯类及酮类溶剂混合后制成, 而硝化纤维粉末与酯类及酮类溶剂所混合的较佳体积比例为 1 : 9。 又, 在此种以浇 注方式形成硝化纤维层的状态下, 可在第二硝化纤维层 1120与第三硝化纤维层 1130 干燥后; 将第二抗体 1121以溶液的方式注入第二硝化纤维层 1120, 再经过风干或冷 冻干燥的过程, 使第二抗体 1121以粉末状的方式留存于第二硝化纤维层 1120之中。
除上述先形成硝化纤维层于流体区底部后再将第二抗体 1121及受质反应试剂形 成于其中的方式之外, 还可将第二抗体 1121以溶液的方式注入预先制备好的硝化纤 维溶液, 混合均匀后, 再浇注于第二流体区 112的底部, 再经风干或冷冻干燥过程, 同时将硝化纤维溶液形成第二硝化纤维层 1120及第二抗体 1121以粉末状的方式留存 其中。
此外, 受质反应试剂 1132形成于第三硝化纤维层 1130中的方式亦与上述第二 抗体 1121形成于第二硝化纤维层 1120的方式大致相同,可釆用先形成第三硝化纤维 层 1130后再注入受质反应试剂并干燥, 或是与硝化纤维溶液混合后一同注入第三流 体区 113底部干燥成型的两种方式, 故在此不再重复赘述。
除上述的第一较佳实施例之外, 本发明亦提供一种流体检测方法, 如下的第二 较佳实施例中所述,其中检测方法中所采用的检测试片, 其构造特征与第一较佳实施 例中大致相同, 故不再重复赘述, 且其中提及的检测试片组件编号, 请参考图 1B至 图 ΙΗο
请参考图 2,为本发明第二较佳实施例流体检测方法的流程示意图。流体检测方 法 2包含以下步骤:
步骤 21 : 提供流体, 流体包含有待测物质 1101, 请参考图 1B。
步骤 22: 提供基板 10, 基板 10包含至少有流道 11。流道 11包含依序连接的第 一流体区 111、第二流体区 112与第三流体区 113,第一流体区 111是供流体的注入。 第一流体区 111中具有第一抗体 1111。 第二抗体区 112中具有第二抗体 1121, 且第 二抗体 1121是固定在第二抗体区 112之中。 又, 第一抗体 1111与第二抗体 1121都 是辨识流体中的同一种待测物质 1101, 但是第一抗体 1111与第二抗体 1121是各自 辨识待测物质 1101上不同的抗原决定位置。 所以在第一抗体 1111和第二抗体 1121 的选用上, 两者均可为单株抗体或多株抗体, 只需要第一抗体 1111和第二抗体 1121 是一组抗体配对, 在进行抗原辨识时, 不致发生互相干扰的状况即可。 第三流体区 113之中则具有受质反应试剂 1132,受质反应试剂 1132包含有醣氧化胸 1133。其中, 过氧化物嗨 1113可以是辣根过氧化物嗨、 抗坏血酸过氧化物腌或是过氧化氢胸。 在 较佳的实施状态中, 醣类材料 1112则可为葡萄糖, 于此同时, 醣氧化嗨 1133则是选 用葡萄糖氧化嗨。 此外, 醣类材料 1112及过氧化物嗨 1113在流道 11的各种分布情 形, 则如第一较佳实施例中所述 (请参考图 1B、 图 1F、 图 1G及图 1H)。
步骤 23: 将流体加至流道 11的第一流体区 111。 流体会沿着流道 11依序由第 一流体区 111流经第二流体区 112, 流至第三流体区 113,并藉使存在于流道 11中的 第一抗体 1111、 醣类材料 1112及过氧化物腌 1113随着流体流动。
步骤 24: 待测物质 1101会随流体流至第二流体区 112, 使待测物质 1101与第 一抗体 1111、 第二抗体 1121及部分的过氧化物嗨 1113结合并一同留置于第二流体 区 112中。流体继续带着醣类材料 1112、未结合的第一抗体 1111及过氧化物胸 1113 流至第三流体区 113。在第三流体区中醣类材料 1112受到醣氧化廡 1133的催化进行 氧化反应, 并产生出过氧化氢 ( 02)。 而过氧化氢会受到流至第三流体区 113的过氧 化物嗨 1113催化与进行反应, 并产生电学信号,利用电极层 19上电极及电路的将电 学信号传出以供仪器侦测 。
步骤 25: 侦测由步骤 24产生的电学信号。 此时, 可通过侦测电学信号的强度, 推算出第三流体区 113中产生出的过氧化氢经过过氧化物腌 1113催化消耗之后, 反 应完毕所剩余的过氧化氢的量,又由于在制作流体检测试片 1之时,要添加的醣类材 料 1111与醣氧化腌 1133两者的含量均为已知的固定值, 故当醣类材料 1111随流体 流至第三流体区 113与醣氧化腌 1133反应后所产生的过氧化氢其总量亦会是可推算 的固定值。所以可通过所侦测到的电学信号强度推算的最终剩余的过氧化氢含量与预 定产生的过氧化氢总量,其两者的差即为在第三流体区 113中被流至此区的过氧化物 1113所消耗的过氧化氢含量, 再将此被消耗的过氧化氢含量推算出参与反应的过 氧化物嗨 1113知浓度, 即可得知流至第三流体区 113中过氧化物鹰 1113的量。再加 上,在制作流体检测试片 1之时,要添加的过氧化物嗨 1113含量也是已知的固定值, 所以留置于第二流体区 112之中的过氧化物嗨 1113其浓度亦可通过「过氧化物胸 1113 总量」与「流至第三流体区 113的过氧化物嗨含量」两者简单相减后推算得知。最后, 利用推算出的留置于第二流体区 112之中的过氧化物胸 1113的浓度, 可再推算出流 体中所含有的待测物质 1101的浓度, 以达到定量检测的目的。
此外, 根据本发明的流体检测方法, 其中第一抗体 1111与过氧化物嗨 1113的 结合方式与较佳选用种类、 各流体区的构造组成、硝化纤维层的构型、形成方式、使 用的硝化纤维溶液的成份与较佳比例、各项反应材料的组成及形成方式,均与前述的 第一较佳实施例相同, 在此不再重复赘述。 以上所述仅为本发明较佳实施例而已, 并非用以限定本发明申请专利权利; 同 时以上的描述对于熟知本技术领域的专门人士应可明了与实施,因此其他未脱离本发 明所揭示的精神下所完成的等效改变或修饰, 均应包含于下述的申请专利范围。 附图简单说明
图 1A, 为本发明的第一较佳实施例流体检测试片的示意图。
图 1B, 为本发明第一较佳实施例流体检测试片流道中反应材料分布示意图。 图 1C至图 1E,为本发明第一较佳实施例流体检测试片流道中反应材料在不同反 应阶段的分布示意图。
图 1F至图 1H,为本发明第一较佳实施例流体检测试片流道中反应材料其他方式 分布示意图。
图 II, 为本发明第一较佳实施例流体检测试片剖面示意图。
图 2, 为本发明第二较佳实施例流体检测方法的流程示意图。 主要元件符号说明
流体检测试片 1
基板 10
流道 11
待测物质 1101
第一流体区 111
纤维层 1110
第一抗体 1111
醣类材料 1112
过氧化物胸 1113
第二流体区 112- 第二硝化纤维层 1120
第二抗体 . 1121
第三流体区 113
第三硝化纤维层 1130
受质反应试剂 1132 醣氧化腌 1133
步骤 21、 22、 23、 24、 25

Claims

权 利 要 求
1. 一种流体检测试片, 主要包含基板, 该基板包含至少流道, 该流道包含依序 连接的第一流体区、第二流体区与第三流体区, 该第一流体区是供流体的注入, 其特 征在于:
第一抗体, 位于第一流体区中, 用于辨识待测物质;
醣类材料, 位于第一流体区或第二流体区中;
过氧化物腌, 位于第一流体区或第二流体区中;
第二抗体, 固定于第二流体区中, 该第二抗体亦辨识该待测物质, 且该第二抗体 及该第一抗体是辨识相异的抗原决定位置; 以及
受质反应试剂, 位于第三流体区中, 该受质反应试剂包含有醣氧化嗨; 藉此, 当包含有该待测物质的流体注入该流道后, 该第一抗体、 该醣类材料及该 过氧化物腌是随着该流体流动,部分的过氧化物嗨会与该第一抗体、该待测物质及该 第二抗体结合并留置于该第二流体区中,未结合的过氧化物腌则随流体流至该第三流 体区, 且该醣氧化嗨会催化流至该第三流体区的该醣类材料进行氧化反应, 并产生出 过氧化氢, 且该过氧化氢会与流至该第三流体区的该过氧化物嗨进行反应,藉以产生 电学信号。
2. 如权利要求 1的流体检测试片, 其中该第一抗体与该过氧化物鹰同时位于第 一流体区中, 并形成共轭结合。
3. 如权利要求 1的流体检测试片, 其中该第一抗体进一步与生物素形成共轭结 合;而该过氧化氢腌是与亲和素形成共轭结合,且该亲合素是选自由下列单元所组成 群组其中之一, 包括有卵白素、 链霉亲合素, 及中性链亲和素。
4. 如权利要求 1的流体检测试片, 其中该第一抗体是为单株抗体, 且该第二抗 体是为单株抗体或多株抗体。
5. 如权利要求 1的流体检测试片, 其中该过氧化物腌是选自由下列单元所组成 的群组其中之一,该群组包括有辣根过氧化物鹰、抗坏血酸过氧化物嗨及过氧化氢胸。
6. 如权利要求 1的流体检测试片, 其中该醣类材料是为葡萄糖, 且该醣氧化嗨 是为葡萄糖氧化鹰。
7. 如权利要求 1的流体检测试片, 迸一步包含有纤维层形成于第一流体区的底 部, 且该反应材料是形成于该纤维层中。
8. 如权利要求 1的流体检测试片, 进一步包含有硝化纤维层分别形成于第二流 体区与第三流体区的底部,且该第二抗体是固定于该第二流体区的硝化纤维层、该受 质反应试剂是形成于该第三流体区的硝化纤维层中。
9- 如权利要求 8的的流体检测试片, 其中该硝化纤维层是为硝化纤维膜。
10. 如权利要求 8的的流体检测试片,其中该硝化纤维层是以硝化纤维溶液经浇 注于第二流体区与第三流体区的底部再经干燥后所形成。
Π. 如权利要求 10的流体检测试片, 其中该硝化纤维溶液是以硝化纤维粉末混 合酯类及酮类溶剂所形成。
12. 如权利要求 11的流体捡测试片, 其中该硝化纤维粉末与酯类及酮类溶剂所 混合的较佳比例为 1 : 9。
13. 如权利要求 10的流体检测试片, 其中该第二抗体是以溶液方式注入该第二 流体区的硝化纤维层, 再经干燥过程后形成粉末状。
14. 如权利要求 13的流体检测试片, 其中该干燥过程是为冷冻干燥。
15. 如权利要求 13的流体检测试片, 其中该干燥过程是为风干。
16; 如权利要求 10的流体检测试片, 其中该第二抗体是以溶液方式注入该硝化 纤维溶液,再经干燥过程同时将该硝化纤维溶液形成该第二流体区的硝化纤维层及该 第二抗体形成粉末状。
17. 如权利要求 16的流体检测试片, 其中该干燥过程是为冷冻干燥。
18. 如权利要求 16的流体检测试片, 其中该干燥过程是为风干。
19. 如权利要求 10的流体检测试片, 其中该受质反应试剂是以受质反应溶液注 入该第三流体区的硝化纤维层, 再经干燥过程后形成粉末状。
20. 如权利要求 19的流体检测试片, 其中该干燥过程是为冷冻干燥。
21. 如权利要求 19的流体检测试片, 其中该干燥过程是为风干。
22: 如权利要求 10的流体检测试片, 其中该葡萄糖反应试剂是以受质反应溶液 注入该硝化纤维溶液,再经干燥过程同时将该硝化纤维溶液形成该第三流体区的硝化 纤维层、 将该受质反应溶液形成粉末状的受质反应试剂。
23. 如权利要求 22的流体捡测试片, 其中该干燥过程是为冷冻干燥。
24. 如权利要求 22的流体检测试片, 其中该干燥过程是为风干。
25. 如权利要求 10的流体检测试片', 其中该第二流体区与第三流体区的最小宽 度为 0. 3 mm。
26. 如权利要求 10的流体检测试片, 其中该基板为生物兼容材料。
27. 如权利要求 10的流体检测试片,其中该流道的表面粗糙度为 3微米至 50微 米之间。
28. 如权利要求 10的流体检测试片, 其中该第二流体区的硝化纤维层平均厚度 等于该第三流体区硝化纤维层厚度。
29. 如权利要求 28的流体检测试片, 其中该流道进一步包括第四流体区, 该第 四流体区的底部亦形成有硝化纤维层, 该硝化纤维层包含有中空网状构型,供多余流 体的贮存。
30. 一种流体检测方法, 包含下列步骤:
提供基板, 该基板包含至少流道, 该流道包含依序连接的第一流体区、第二流体 区与第三流体区, 该第一流体区是供流体的注入, 该基板进一步包含有:
第一抗体, 位于第一流体区中, 用于辨识该流体内的该待测物质 ;
醣类材料, 位于第一流体区或第二流体区中;
过氧化物胸, 位于第一流体区或第二流体区中;
第二抗体, 固定于第二流体区中, 该第二抗体亦辨识该待测物质, 且该第二抗体 及该第一抗体是辨识相异的抗原决定位置; 以及
受质反应试剂, 位于第 流体区中, 该受质反应试剂包含有醣氧化腌; 将该流体流至该流道的第一流体区,使该第一抗体、该醣类材料及该过氧化物嗨 是随着该流体流动;
使该待测物质与该第一抗体、该第二抗体及部分的过氧化物嗨结合并留置于该第 二流体区中; 使该流体带着该醣类材料、未结合的第一抗体及过氧化物酶流至该第三 流体区; 使该醣类材料受到该醣氧化腌的催化进行氧化反应, 并产生出过氧化氢; 使 流至该第三流体区的该过氧化物嗨与该过氧化氢进行反应, 并产生电学信号; 以及 侦测该电学信号。
31. 如权利要求 30的流体检测方法, 其中该第一抗体与该过氧化物嗨同时位于 第一流体区中, 并形成共轭结合。
32. 如权利要求 30的流体检测方法, 其中该第一抗体进一步与生物素形成共轭 结合, 而该过氧化氢嗨是与亲和素形成共轭结合, 且该亲合素是选自由下列单元所组 成群组其中之一, 包括有卵白素、 链霉亲合素, 及中性链亲和素。
33. 如权利要求 30的流体检测方法, 其中该第一抗体是为单株抗体, 且该第二 抗体是为单株抗体或多株抗体。
34. 如权利要求 30的流体检测方法, 其中该过氧化物嗨是选自由下列单元所组 成的群组其中之一, 该群组包括有辣根过氧化物嗨、抗坏血酸过氧化物酶及过氧化氢 m
35. 如权利要求 30的流体检测方法, 其中该醣类材料是为葡萄糖, 且该醣氧化 腌是为葡萄糖氧化嗨。
36. 如权利要求 30的流体检测方法, 进一步包含有一纤维层形成于第一流体区 的底部, 且该反应材料是形成于该纤维层中。
37. 如权利要求 30的流体检测方法, 进一步包含有硝化纤维层分别形成于第二 流体区与第三流体区的底部,且该第二抗体是固定于该第二流体区的硝化纤维层、该 受质反应试剂是形成于该第三流体区的硝化纤维层中。
38. 如权利要求 37的的流体检测方法, 其中该硝化纤维层是为硝化纤维膜。
39. 如权利要求 37的的流体检测方法, 其中该硝化纤维层是以硝化纤维溶液经 浇注于第二流体区与第三流体区的底部再经干燥后所形成。
40. 如权利要求 39的流体检测方法, 其中该硝化纤维溶液是以硝化纤维粉末混 合酯类及酮类溶剂所形成。
41. 如权利要求 40的流体检测方法, 其中该硝化纤维粉末与酯类及酮类溶剂所 混合的较佳比例为 1 : 9。
42. 如权利要求 39的流体检测方法, 其中该第二抗体是以溶液方式注入该第二 流体区的硝化纤维层, 再经干燥过程后形成粉末状。
43. 如权利要求 42的流体检测方法, 其中该干燥过程是为冷冻干燥。
44. 如权利要求 42的流体检测方法, 其中该干燥过程是为风干。
45. 如权利要求 39的流体检测方法, 其中该第二抗体是以溶液方式注入该硝化 纤维溶液,再经干燥过程同时将该硝化纤维溶液形成该第二流体区的硝化纤维层及该 第二抗体形成粉末状。
46. 如权利要求 45的流体检测方法, 其中该干燥过程是为冷冻干燥。
47. 如权利要求 45的流体检测方法, 其中该干燥过程是为风干。
48. 如权利要求 39的流体检测方法, 其中该受质反应试剂是以受质反应溶液注 入该第三流体区的硝化纤维层, 再经干燥过程后形成粉末状。
49. 如权利要求 48的流体检测方法, 其中该干燥过程是为冷冻干燥。
50. 如权利要求 48的流体检测方法, 其中该干燥过程是为风干。
51. 如权利要求 39的流体检测方法, 其中该葡萄糖反应试剂是以受质反应溶液 >注入该硝化纤维溶液,再经干燥过程同时将该硝化纤维溶液形成该第三流体区的硝化 纤维层、 将该受质反应溶液形成粉末状的受质反应试剂。
52. 如权利要求 51的流体检测方法, 其中该干燥过程是为冷冻干燥。
53. 如权利要求 51的流体检测方法, 其中该干燥过程是为风干。
54. 如权利要求 39的流体检测方法, 其中该第二流体区与第三流体区的最小宽 度为 0. 3 mm。
55. 如权利要求 39的流体检测方法, 其中该基板为生物兼容材料。
56. 如权利要求 39的流体检测方法,其中该流道的表面粗糙度为 3微米至 50微 米之间。
57. 如权利要求 39的流体检测方法, 其中该第二流体区的硝化纤维层平均厚度 等于该第三流体区硝化纤维层厚度。
58. 如权利要求 57的流体检测方法, 其中该流道进一步包括第四流体区, 该第 四流体区的底部亦形成有硝化纤维层,该硝化纤维层包含有中空网状构型, 供多余流 体的贮存。
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