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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 24, Number 3
BKCSDE 24(3)
March 20, 2003

Title	Development of an Enzyme-Linked Immunosorbent Assay for the Organophosphorus Fungicide Tolclofos-methyl
Author	Kyung Yi Park, Won Chul Park, Yoo Jung Kim, Yong Tae Lee
Keywords	Tolclofos-methyl, Fungicide, Enzyme-linked immunosorbent assay, ELISA
Abstract	A simple synthetic method for haptens of organophosphorus (OP) pesticides with a spacer arm (aminocarboxylic acid) attached at the pesticide thiophosphate group was developed and was applied to the synthesis of haptens for the OP fungicide tolclofos-methyl. Using the haptens, a selective enzyme-linked immunosorbent assay (ELISA) for tolclofos-methyl was developed. One of the haptens was coupled to BSA to use as an immunogen. Rabbits were immunized with this conjugate to obtain polyclonal antibodies to tolclofos-methyl. The antisera were screened against another hapten coupled to ovalbumin (OVA). Using the serum with highest specificity, an antigen-coated ELISA was developed, which showed an IC50 of 160 ng/mL with the detection limit of 20 ng/mL. The antibodies showed negligible cross-reactivity with other OP pesticides. An antibody-coated ELISA was also developed, which showed an IC50 of 410 ng/mL with a detection limit of 130 ng/mL.
Page	334 - 338
Full Text	PDF

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