WO1991005259A1 - Improved method for detecting pesticides at the picogram level - Google Patents
Improved method for detecting pesticides at the picogram level Download PDFInfo
- Publication number
- WO1991005259A1 WO1991005259A1 PCT/US1990/005424 US9005424W WO9105259A1 WO 1991005259 A1 WO1991005259 A1 WO 1991005259A1 US 9005424 W US9005424 W US 9005424W WO 9105259 A1 WO9105259 A1 WO 9105259A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antibody
- pesticide
- assay
- concentration
- methyl
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/5308—Immunoassay; Biospecific binding assay; Materials therefor for analytes not provided for elsewhere, e.g. nucleic acids, uric acid, worms, mites
Definitions
- An immobilized antigen format and reduction in concentration of antibody is a strategy for increasing assay sensitivity but the art teaches that the reliability of the measurement decreases as the antibody concentration decreases.
- This invention concerns an improved antigen-capture enzyme-linked immunosorbent assay, for measuring the presence of a target pesticide or derivative thereof (referred to hereafter as "pesticide” or "analyte") in a medium, comprising the steps of: (a) forming a complex of the pesticide in the medium with an excess of a first antibody of known titer;
- Step (b) binding the free antibody from Step (a) to a coating conjugate that is bound to a solid phase; (c) binding a signal-generating labeled antibody to the antibody-coating conjugate complex of Step (b);
- step (d) determining the amount of pesticide in the medium by comparing the signal generated by the labeled antibody of Step (c) to the signal generated by running the above steps with a sample containing no pesticide and one or more samples containing known concentrations of pesticide; wherein the improvement comprises: (i) diluting the titer of the first antibody employed in Step (a) such that the concentration of pesticide needed to reduce the signal generated by the label in Step (d) by 50% is less than one-half the concentration required without the dilution; and ( ⁇ ) increasing the titer of the labeled antibody employed in Step (c) so that the total time necessary to run the assay is about the same as a normal assay without the dilution of (i); thereby (iii) increasing by a factor of at least two the sensitivity of the assay to detect target pesticide.
- coating conjugate is meant a hapten chemically conjugated to a protein, sometimes called “coating antigen”.
- the present invention provides a method for rapid, sensitive and accurate measurement of picogram/ml concentrations of a pesticide or derivative in water, or in an aqueous extract of soil, food or crops, wherein the unprecedented sensitivity is obtained by dilution of the antigen-specific antibody relative to standard ELISA conditions.
- the art teaches reducing the amount of antibody to increase the sensitivity of the assay but also teaches that the increase in sensitivity may be accompanied by a decrease in precision.
- the technical difficulty of detecting very low concentrations of antibodies in a timely fashion to prevent time dependent changes precludes the practical application of this technique to obtain high sensitivity.
- an interrelated aspect of the present invention provides for an increase in concentration of the labeled antibody to restore detection to a standard assay time frame.
- the resulting sensitivity is in the 1 to 100 picogram/ml range in an aqueous medium. Samples containing higher concentrations may be diluted into this range, which offers the advantage of significant reduction in errors introduced by too-high concentrations of unknown materials in the medium; that is, a reduction in matrix effects.
- Preferred first antibody is rabbit polyclonal antibody produced by methods described hereafter.
- Preferred labeled antibody-enzyme conjugate is alkaline phosphatase-goat anti-rabbit IgG.
- Preferred protein-antigen conjugates (coating conjugates) are described hereafter.
- Preferred as a solid phase support is a 96-well microtiter plate.
- the particular ELISA employed in this invention makes use of antigen capture in the following steps.
- the selected antibody is contacted with a test sample containing the pesticide, whereby a fraction of said antibody forms a complex with the pesticide and the balance remains free.
- the free antibody is then separated from the reaction mixture by contacting the reaction mixture with a solid phase comprising the antigen or an analog of the antigen immobilized on a solid phase.
- the reaction mixture is then removed from the solid phase by washing, and the solid phase is contacted with a labeled second antibody then which reacts with the bound first antibody.
- the unbound labeled second antibody is removed by washing and the amount of first antibody-labeled second antibody complex that has been formed is measured using the label.
- the amount of pesticide in the sample is then determined, photometrically, or by any other art-recognized method, by comparison with a standard curve derived by running the assay with several known concentrations of pesticide.
- Van Emon et al. "Analytical Methods for Pesticides and Plant Growth Regulators", Vol. XVII, 1989, pages 217 to 263 state that "the point of attachment of hapten to protein should occur away from any suspected antigenic determinants" to insure proper antigenic response for developing specific antibodies. They also state that to develop a compound class specific assay the hapten structure for immunization is important, particularly preserving the common antigenic determinants of the related compounds.
- the hapten in the coating conjugate is selected so that it is structurally similar both to the pesticide to be analyzed and to the hapten in the conjugate against which antibody was raised.
- the carboxylate moiety is used for attachment of the hapten to the coating protein.
- the best coating protein/hapten combination is determined empirically based on maximizing affinity for the first antibody.
- haptens that are useful in this invention are as follows:
- the solid phase component of Step (b) is chosen for its characteristics of efficient immobilization of the coating conjugate, for its non-specific binding characteristics, and its ease of use in the separation of free antibody from bound antibody.
- the solid phase material can be fabricated from any number of synthetic materials which can take up the protein-antigen conjugate in a reproducible manner.
- the solid phase material can be fabricated from non-porous metal oxides, polymeric materials such as agarose, polystyrene, polyacrylamide, their derivatives or mixtures thereof. It can be present pre-formed as a particle, bead, a microplate, dip-stick, filter paper, tube, magnetic particle or a matrix having a density greater than water.
- the solid phase material can be delivered to the reaction vessel as a dry powder, wet slurry, tablet, capsule or as a pre-formed distinct shape.
- Immobilized on the solid phase material is an optimized concentration of coating conjugate where the hapten is structurally similar to the unknown being analyzed, and is capable of binding the free first antibody in the reaction mixture which consists of the target pesticide and the pesticide-specific polyclonal first antibody.
- the reaction mixture and the treated solid phase material become separated into a solid phase containing the coating conjugate bound with any excess first antibody which will subsequently be quantified, and a liquid phase containing the soluble antibody-pesticide complex which is removed from the solid phase by washing.
- the immobilization of the coating conjugate on the solid phase is preferentially by passive adsorption of the protein but can be by covalent bonding either directly or through a spacer arm, or by an avidin-biotin binding where the solid phase is avidinylated or biotinylated and the protein is biotinylated or avidinylated.
- avidin-biotin binding where the solid phase is avidinylated or biotinylated and the protein is biotinylated or avidinylated.
- the hapten conjugate is an analogue of the unknown suspect pesticide, which can provide for an additional difference in affinity and is complementary to the "avidity" effect.
- avidity refers to the sum of the affinity constants of the polyclonal antibody.
- the bound second antibody is measured via its attached label.
- the second antibody concentration is inversely proportional to the concentration of the unknown in the sample, determined by comparison to a standard curve.
- a labeled second antibody which is directed against the Fc portion of the bound first antibody.
- Typical labels include enzymes, radioisotopes, chromophores, fluorophores or any substance capable of generating a detectable signal, either alone or in combination with other reagents. Procedures and methods for labeling and identifying the labeled complexes are known in the art of diagnostic immunoassay and are generally discussed in Miles et al., "Labelled Antibodies and Immunological Assay Systems", Nature. 219_, pages 187 to 189 (1968) and U.S. 3,654,090.
- the preferred label in the instant invention is an anti-rabbit antibody-alkaline phosphatase conjugate and a p-nitrophenyl phosphate substrate for quantitation.
- the enzyme label is preferred due to the availability of sensitive chromogenic substrates and simple instrumentation to quantitate results.
- Sulfonylureas whose presence can be detected and measured by the method of this invention include:
- 1,4-benzene-dicarboxylate desmediphan ethyl [3-[ [(phenylaminoj- carbonyljoxyjphenyljcarba ate desmetryn 2-(isopropylamino)-4-(methyl- amino)-6(methylthio)-s- triazine diallate S-(2,3-dichloro-2-propenyl)- bis(lmethylethyl)carbamothioate dicamba 3,6-dichloro-2-methoxybenzoic acid dichlobenil 2,6-dichlorobenzonitrile dichlorprop (+)-2-(2,4-dichlorophenoxy)- propanoic acid dichlofop (+)-2-[4-(2,4-dichlorophenoxy)- phenoxy]pro ⁇ anoic acid diethatyl N-(chloroacetyl)-N-(2 ,6-diethyl- phenyl)glycine difenzoquat 1,2-
- MCPB 4-(4-chloro-2- ethyIphenoxy)- butanoic acid mecoprop (+)-2-(4-chloro-2-methylphenoxy)- propanoic acid mefizidide N-[2,4-dimethyl-5-[[(trifluoro ⁇ methyl)sulfonyl]amino]phenyl]- acetamide methal- N-(2-methyl-2-propenyl)-2, 6- propalin dinitro-N-4-(tri- fluoromethyl)benzenamide methabenz- 1,3-dirnethyl-3-(2-benzothia- thiazuron zolyl)urea metham methylcarbamodithioic acid methazole 2-(3,4-dichlorophenyl)-4-methyl- l,2,4oxadiazolidine-3,5-dione methoxuron '-(3-chloro-4-methoxyphenyl)-
- PPG-1013 5-[2-chloro-4-(trifluoromethyl)- phenoxy]-2-nitroacetophenone oxime-O-acetic acid, methyl ester procyazme 2-[[4-chloro-6-(cyclopropyl- amino)-l,3,5triazine-2- yl]amino]-2-methylpropane- nitrile profluralin N-(cyclopropylmethyl)-2,6- dinitro-Npropyl-4-(tri- fluoromethyl)benzenamine prometon 6-methoxy-N,N'-bis(1-methyl ⁇ ethyl)-1,3,5triazine-2,4- diamine prometryn N,N"-bis(1-methylethyl)-6-
- N(1-methylethyl)acetamide Fungicides methyl 2-benzimidazolecarbamate (carbendazim) tetramethylthiuram disulfide (thiuram) n-dodecylguanidine acetate (dodine) manganese ethylenebisdithiocarbamate (maneb) 1,4-dichloro-2,5-dimethoxybenzene (chloroneb) methyl 1-(butylearbamoyl)-2-benzimidazolecarbamate (benomyl)
- 1,2,4-triazole-l-ethanol Impact®, flutriafol
- l-[ [bis(4-fluorophenyl)methylsilyl)methyl]-lH-l,2,4- triazole Nustar®, flusilazol
- 1-N-propyl-N-[2(2,4,6-trichlorophenoxy)ethyl]- carbamoylimidazole Sportak®, prochloraz
- Insecticides 3-hydroxy-N-methylcrotonamide(dimethylphosphate) ester (Azodrin®, monocrotophos) methylcarbamic acid, ester with 2,3-dihydro-2,2- dimethyl-7-benzofuranol (Furadan, carbofuran) 0-[2,4,5-trichloro-a-(chloromethyl)benzyl]phosphoric acid, 0' ,0'-dimethyl ester (Gardona, tetrachlor- vinphos) 2-mercaptosuccinic acid, diethyl ester, S-ester with thionophosphoric acid, dimethyl ester (malathion) phosphorothioic acid, 0,0-dimethyl, O-p-nitrophenyl ester (methyl parathion) methylcarbamie acid, ester with a-naphthol (Sevin®, carbaryl) methyl N-[ [ (methylamino)carbonyl]oxy]ethanimid
- % CV is the coefficient of variation, which is defined as:
- milli-absorbance units refers to milli-absorbance units.
- Washing refers to. rinsing at least two times with PBS/Tween-20® solution.
- PBS refers to phosphate-buffered saline (see below) .
- Tween-20® is a syrup of polyoxyethylene sorbitan esters available from the Sigma Chemical Company.
- Tissuemizer® is a homogenizer manufactured by the TekMar Corporation.
- O.D. refers to optical density.
- the coating conjugate coating step was conducted by dispensing 200 ⁇ l of coating conjugate at a concentration of 0.1 ⁇ g/ml in 0.1 M NaHC0 3 , pH 9.4, in each well of a 96-well, flat-bottomed microwell plate and incubating at 4°C overnight. This time was chosen for convenience. Two hours at room temperature produces the same results.
- a concentration of 0.1 ⁇ g/ml coating conjugate was selected in an ELISA assay where a range of coating conjugate concentrations and a range of first antibody dilutions are assayed in various combinations (commonly referred to as a checker board ELISA).
- the coating conjugate in the case of metsulfuron methyl was preferentially a metsulfuron methyl analog but may be 5-carboxy-metsulfuron methyl covalently coupled to ovalbumin.
- Other proteins can be used such as bovine serum albumin (BSA) and keyhole limpet hemocyanin (KLH) depending on the hapten-carrier protein used as an immunogen.
- microwell plate was made of polystyrene. These plates are provided with a quality control certificate showing a physical and immuno-chemical control. Physical control: All wells were within +/-0.005 absorbance units from the mean. Immuno-chemical Control of homogenity is tested through adsorption of IgG. CV less than 5%. All results within +/- 10% from mean. B. Microplate Washing
- a wash solution consisting of phosphate- buffered saline (PBS) which contains 0.12 M NaCl, 2.7 mM KC1, 10 mM phosphate buffer at a pH of 7.5 at 25°C, and 0.05% Tween-20®, was used to remove excess coating conjugate from each well. Then, each well is filled with 200 ⁇ l of 3% BSA in PBS solution at room temperature and incubated for 2 hours to block the remaining sites. Excess blocking solution was then removed by washing and the plates are shaken to remove any droplets of moisture and stored at 4°C in sealed plastic bags.
- PBS phosphate- buffered saline
- the first antibody used in this assay was whole rabbit antiserum raised against an immunogen conjugate consisting of a carboxylic derivative of metsulfuron methyl, Compound (4), which was covalently coupled to the protein keyhole limpet hemocyanin (KLH) .
- the antiserum diluted in PBS/0.5% BSA, comprises the first antibody reagent.
- Antibody dilutions of 1:100, 1:125, 1:165, 1:250 and 1:500 X 10 3 were made and standard curves were generated with each of these antibody dilutions.
- Alkaline Phosphatase conjugated Affinipure Goat Anti-Rabbit IgG was prepared according to the manufacturer's instructions. The antibody concentration was 6 mg/ml and suggested dilution range is 1:5,000 to 1:50,000 for enzyme immunoassays using PNPP. In the standard ELISA assay, a 1:5,000 (.0012 mg/ml) dilution was made with PBS/0.5% BSA.
- the enzyme substrate was formed from 1 mg/ml p-nitrophenyl phosphate in diethanolamine buffer, pH 9.8.
- Diethanolamine buffer, 10% consists of 97 ml of diethanolamine, 800 ml of water, 0.2 g of NaN , 100 mg of MgCl 2 6H 2 0; 1 M HC1 was added until the pH is 9.8.
- the total volume was made up to 1 liter with water and stored at room temperature in an amber bottle.
- the p-nitrophenyl phosphate is commercially available.
- the assay was performed at room temperature and consisted of 1.0 ml of sample plus 0.8 ml PBS plus 0.2 ml of 10 X PBS/1% BSA for a total volume of 2.0 ml.
- the first antibody, 50 ⁇ l was added to each sample.
- Standards were prepared similarly. The standards were 0, 0.005, 0.010, 0.025, 0.050 ng/ml.
- Each standard curve contained the antibody in one of the dilutions as described in C. After vortex-mixing and one hour preincubation, 200 ⁇ l of each reaction mixture was added to microplate wells in triplicate.
- the plate was washed and 200 ⁇ l of second antibody-enzyme conjugate was added and incubated for 1 hour on the microplate.
- the microplate was washed again and 200 ⁇ l of substrate solution was added.
- a microplate reader was used to measure the absorbance at 405 n in each well of the microplate.
- the negative control absorbance is the maximum O.D. measured in the absence of antigen and the standard absorbance is the O.D. obtained at the same time (as the negative control) with a known concentration of antigen.
- 0% inhibition indicates no analyte is present.
- the percent inhibition exceeds about 15, accurate concentration can be easily determined.
- the first antibody used in this assay was whole rabbit antiserum raised against an immunogen conjugate consisting of a carboxylic acid derivative of chlorimuron ethyl, Compound (5), which was covalently coupled to the protein keyhole limpet hemocyanin (KLH) .
- the antiserum diluted in PBS/0.5% BSA comprises the first antibody reagent.
- the assay was performed substantially as in the metsulfuron methyl assay (Example 1) .
- Standards were prepared at 2.5, 5, 10, and 50 picogram/ml of chlorimuron ethyl by adding 20 ⁇ l of an appropriate concentration stock solution to 1.8 ml of water only.
- To each standard was added 200 ⁇ l of 10% PBS/1% BSA and 10 ⁇ l of one of the four first antibody reagent dilutions, then each tube was vortex-mixed and incubated at room temperature for one hour.
- first antibody dilution was 1:500 X 10 ⁇ in the assay in all cases; and second antibody-enzyme conjugate concentration was 1.2, 2.4 or 4.8 ⁇ g/ml.
- concentration of 1.2 ⁇ g/ml is an art-recognized concentration whereas those of 2.4 and 4.8 are about 2X and 4X more concentrated than the art would suggest.
- the antigen conjugate coating and blocking of microplates was carried out as described above.
- the first antibody reagent used was diluted by the optimal dilution factor determined above, to a final titer of 1:320,000 in the assay.
- the labeled antibody-enzyme conjugate reagent was prepared as above and diluted so that 1.2, 2.4 and 4.8 ⁇ g/ml conjugate concentrations were used in the assays.
- B Results
- the optimal conjugate concentration was 4.8 micrograms/ml.
- the assay sensitivity and dynamic range were not affected by changes in the conjugate concentration.
- the ELISA procedure was as described with the first antibody dilution at 1:100 X 10 3 and 1:500 X 10 3 for titer 1:100,000 and 1:500,000, the standard and high sensitivity assay, respectively.
- the labeled second antibody enzyme conjugate concentration was at 1.2 ⁇ g/ml for the standard assay and at 4.8 ⁇ g/ml for the high sensitivity assay.
- the presence of metsulfuron methyl was detected and measured at about 100 pg/ml in the following media: apple juice, apricot juice, white grape juice, orange juice, tomato juice, nectarine fruit, and tomato fruit.
- metsulfuron methyl was measured at about 100 pg/ml (after extraction into an aqueous medium) in corn forage and corn stover.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US41840389A | 1989-10-06 | 1989-10-06 | |
US418,403 | 1989-10-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991005259A1 true WO1991005259A1 (en) | 1991-04-18 |
Family
ID=23657986
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1990/005424 WO1991005259A1 (en) | 1989-10-06 | 1990-09-27 | Improved method for detecting pesticides at the picogram level |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0496804A1 (en) |
JP (1) | JPH05501156A (en) |
AU (1) | AU6627390A (en) |
CA (1) | CA2067342A1 (en) |
WO (1) | WO1991005259A1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000014538A1 (en) * | 1998-09-09 | 2000-03-16 | Osborn Group, Inc. | Linker-assisted immunoassay for glyphosate |
WO2001007912A2 (en) * | 1999-07-23 | 2001-02-01 | Exiqon A/S | Immunoassay for pesticides and their degradation products |
EP0786089B1 (en) * | 1994-10-11 | 2001-12-12 | Abbott Laboratories | Deposit assessment methodology of bacillus thuringiensis delta-endotoxin |
US6616846B2 (en) | 2001-08-28 | 2003-09-09 | Mds (Canada) Inc. | Extraction of phosphonates |
US6635434B1 (en) | 1999-09-17 | 2003-10-21 | Exiqon A/S | Immunoassay for pesticides and their degradation products |
CN102807488A (en) * | 2011-11-29 | 2012-12-05 | 中国农业科学院农产品加工研究所 | Hapten and antigen universally used for ether pyrethroid pesticide, and synthesis method and application of hapten and antigen |
CN105403703A (en) * | 2015-12-23 | 2016-03-16 | 中国烟草总公司郑州烟草研究院 | Carbendazim detection ELISA (enzyme linked immunosorbent assay) kit and application thereof |
CN109270263A (en) * | 2017-07-18 | 2019-01-25 | 中国医学科学院药用植物研究所 | The preparation and the application in Chinese medicine of a kind of carbendazim sxemiquantitative colloidal gold strip |
CN113684187A (en) * | 2021-09-22 | 2021-11-23 | 江南大学 | Hybridoma cell strain secreting monoclonal antibody to fluazifop-butyl as well as preparation method and application of hybridoma cell strain |
CN114199867A (en) * | 2022-02-21 | 2022-03-18 | 广东江门中医药职业学院 | Method for detecting chlordimeform in aquatic product |
CN114685387A (en) * | 2022-05-31 | 2022-07-01 | 深圳市易瑞生物技术股份有限公司 | Flutriafol hapten, antigen, antibody, detection device, preparation and application thereof |
-
1990
- 1990-09-27 AU AU66273/90A patent/AU6627390A/en not_active Abandoned
- 1990-09-27 EP EP19900916126 patent/EP0496804A1/en not_active Ceased
- 1990-09-27 WO PCT/US1990/005424 patent/WO1991005259A1/en not_active Application Discontinuation
- 1990-09-27 JP JP51495890A patent/JPH05501156A/en active Pending
- 1990-09-27 CA CA 2067342 patent/CA2067342A1/en not_active Abandoned
Non-Patent Citations (4)
Title |
---|
Abstracts of Papers of the American Chemical Society, vol. 198, 1989, 198th ACS (American Chemical Society) National Meeting, Miami Beach, Florida US, September 10-15, 1989, J.K. Sharp et al.: "An ELISA method for the detection of chlorsulfuron in soil and water", and R.J. Bushway et al.: "Analysis of pesticide residues by competitive ELISA", * |
Abstracts of Papers of the American Chemical Society, vol. 198, 1989, abstract no. 4, (10 September 1989), R.J. Bushway et al.:"Analysis of pesticide residues by competitive enzyme-linked immunosorbant assay", * |
Abstracts of Papers of the American Chemical Society, vol. 198, 1989, abstract no. 7, (10 September 1989), J.K. Sharp et al.: "An ELISA method for the detection of chlorsulfuron in soil and water", * |
Journal of Agricultural Food Chemistry, vol. 33, 28 May 1985, American Chemical Society, (Washington, DC, US), M.M. Kelley et al.: "Chlorsulfuron determination in soil extracts by enzyme immunoassay", pages 962-965 * |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0786089B1 (en) * | 1994-10-11 | 2001-12-12 | Abbott Laboratories | Deposit assessment methodology of bacillus thuringiensis delta-endotoxin |
US6344338B1 (en) * | 1994-10-11 | 2002-02-05 | Valent Biosciences Corporation | Deposit assessment of Bacillus thuringiensis delta-endotoxin |
WO2000014538A1 (en) * | 1998-09-09 | 2000-03-16 | Osborn Group, Inc. | Linker-assisted immunoassay for glyphosate |
WO2001007912A2 (en) * | 1999-07-23 | 2001-02-01 | Exiqon A/S | Immunoassay for pesticides and their degradation products |
WO2001007912A3 (en) * | 1999-07-23 | 2001-12-06 | Exiqon As | Immunoassay for pesticides and their degradation products |
US6635434B1 (en) | 1999-09-17 | 2003-10-21 | Exiqon A/S | Immunoassay for pesticides and their degradation products |
US6616846B2 (en) | 2001-08-28 | 2003-09-09 | Mds (Canada) Inc. | Extraction of phosphonates |
CN102807488B (en) * | 2011-11-29 | 2014-04-23 | 中国农业科学院农产品加工研究所 | Hapten and antigen universally used for ether pyrethroid pesticide, and synthesis method and application of hapten and antigen |
CN102807488A (en) * | 2011-11-29 | 2012-12-05 | 中国农业科学院农产品加工研究所 | Hapten and antigen universally used for ether pyrethroid pesticide, and synthesis method and application of hapten and antigen |
CN105403703A (en) * | 2015-12-23 | 2016-03-16 | 中国烟草总公司郑州烟草研究院 | Carbendazim detection ELISA (enzyme linked immunosorbent assay) kit and application thereof |
CN105403703B (en) * | 2015-12-23 | 2017-06-30 | 中国烟草总公司郑州烟草研究院 | Detect enzyme linked immunological kit and its application of carbendazim |
CN109270263A (en) * | 2017-07-18 | 2019-01-25 | 中国医学科学院药用植物研究所 | The preparation and the application in Chinese medicine of a kind of carbendazim sxemiquantitative colloidal gold strip |
CN113684187A (en) * | 2021-09-22 | 2021-11-23 | 江南大学 | Hybridoma cell strain secreting monoclonal antibody to fluazifop-butyl as well as preparation method and application of hybridoma cell strain |
CN113684187B (en) * | 2021-09-22 | 2023-07-18 | 江南大学 | Hybridoma cell strain secreting fluazinam monoclonal antibody as well as preparation method and application thereof |
CN114199867A (en) * | 2022-02-21 | 2022-03-18 | 广东江门中医药职业学院 | Method for detecting chlordimeform in aquatic product |
CN114199867B (en) * | 2022-02-21 | 2022-04-19 | 广东江门中医药职业学院 | Method for detecting chlordimeform in aquatic product |
CN114685387A (en) * | 2022-05-31 | 2022-07-01 | 深圳市易瑞生物技术股份有限公司 | Flutriafol hapten, antigen, antibody, detection device, preparation and application thereof |
Also Published As
Publication number | Publication date |
---|---|
JPH05501156A (en) | 1993-03-04 |
CA2067342A1 (en) | 1991-04-07 |
AU6627390A (en) | 1991-04-28 |
EP0496804A1 (en) | 1992-08-05 |
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