Immunoassay detection of drugs in racing horses. IV. Detection of fentanyl and its congeners in equine blood and urine by a one step ELISA assay.

T Tobin,H H Tai, C L Tai, P K Houtz, M R Dai,W E Woods, J M Yang, T J Weckman,S L Chang, J W Blake

Research communications in chemical pathology and pharmacology(1988)

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摘要
We have developed and evaluated a one step enzyme-linked immunosorbent assay (ELISA) test for fentanyl as part of a panel of pre- and post-race tests for narcotic analgesics in racing horses. This ELISA test detects fentanyl with an I-50 of about 100 pg/ml. The test is economical in that it can be read with an inexpensive spectrophotometer, or even by eye. The test is rapid, and ten samples, a normal pre-race complement, can be analyzed in about twenty minutes. The test readily detects the presence of fentanyl or its metabolites in equine blood and urine from two and twenty-four hours respectively after administration of sub-therapeutic doses. The two antibodies evaluated also cross-react with the methylated analogs of fentanyl, sufetanil and carfentanil and the test detected these drugs shortly after their administration to horses. When introduced into routine screening, this test, in combination with another immunoassay test previously described, yielded 10 sufentanil positives. As such this test is capable of both improving the quality and reducing the cost of pre-race and post-race testing for fentanyl and a number of its congeners in racing horses.
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