Method and reagents for detecting amphetamine and/or d-methamphetamine in biological samples
申请人:ABBOTT LABORATORIES
公开号:EP0371253A2
公开(公告)日:1990-06-06
This disclosure relates to a method and reagents for determining amphetamine and d-methamphetamine in a biological fluid, such as urine. In particular, this disclosure relates to improvements in a fluorescence polarization immunoassay procedure for determining the presence of amphetamine and d-methamphetamine in a single assay and to a novel class of tracer compounds employed as reagents in such procedures. The procedure described includes pretreatment of the biological sample to eliminate cross-reactants such as β-hydroxyphenethylamine by preincubating the sample solely with an aqueous periodate solution having a pH from about 4.0 to about 7.5 without adjustment to an alkaline pH, and contacting the sample with riboflavin binding protein to reduce interference from fluorescent components in the sample. The procedure also maintains the cross reactivity of the immunoassay for tyramine at about 0.4% and for l-methamphetamine below about 5.1% and eliminates the necessity of using controlled substances as starting materials.
本公开涉及一种测定生物液体(如尿液)中苯丙胺和 d-甲基苯丙胺含量的方法和试剂。特别是,本公开涉及一种荧光偏振免疫测定程序的改进,该程序可在一次测定中确定苯丙胺和 d-甲基苯丙胺的存在,还涉及在此类程序中用作试剂的一类新型示踪化合物。所述程序包括对生物样品进行预处理,以消除交叉反应物,如β-羟基苯乙胺,方法是仅将样品与 pH 值为约 4.0 至约 7.5 的高碘酸盐水溶液预孵育,pH 值无需调整为碱性,并将样品与核黄素结合蛋白接触,以减少样品中荧光成分的干扰。该程序还能使免疫测定对酪胺的交叉反应性保持在 0.4%左右,对 l-甲基苯丙胺的交叉反应性保持在 5.1%以下,并且无需使用受控物质作为起始材料。