Enzyme immunoassay for methamphetamine.

Abstract

A competitive enzyme immunoassay for methamphetamine [a drug of abuse] with alkaline phosphatase labeled methamphetamine. Sepharose-antibody and p-nitrophenylphosphate as substrate was developed. The anti-methamphetamine antisera produced in rabbits by immunization with N-(4-aminobutyl) methamphetamine-BSA [bovine serum albumin] conjugate were specific for methamphetamine and showed low cross-reactivities with p-OH methamphetamine and amphetamine (metabolites of methamphetamine). The range of methamphetamine measurable by the enzyme immunoassay was 1-300 ng/tube. According to the assay, methamphetamine could be detected from [human] urine and extract of hair.