申请人:Abbott Laboratories
公开号:US05099020A1
公开(公告)日:1992-03-24
The present invention provides methods and compositions for assaying biological samples, such as human serum, for barbiturates. In one aspect, analogs of barbiturates derivatized with fluorescein and analogs of barbiturates derivatized with immunogenic polypeptides are provided. The fluorescent analogs are employed as tracers in a competitive homogeneous immunoassay, i.e., a fluorescence polarization immunoassay, for detecting barbiturates. The immunogenic analogs are employed to make anti-barbiturate antiserum of the invention for use in the immunoassay method. Intermediates for preparing the fluorescent and immunogenic analogs are also provided. Further provided are test kits, comprising a fluorescent tracer and an antiserum according to the invention, for analyzing biological samples by fluorescence polarization immunoassay for the presence of a barbiturate. Further, an improvement is provided in immunoassays for analytes in serum, wherein a transfer means, such as a pipette, is used repeatedly to transfer different samples into the assay system. In the improvement, an aqueous solution of specified composition, comprising dimethylsulfoxide and an alkali halide, is used to wash the transfer means between transfers.
本发明提供了一种检测生物样本(如人类血清)中巴比妥类药物的方法和组合物。在一个方面,提供了与荧光素衍生物化合物和与免疫原性多肽衍生物化合物衍生的巴比妥类药物的类似物。荧光类似物被用作追踪剂,用于竞争性均相免疫测定,即荧光极化免疫测定,用于检测巴比妥类药物。免疫原性类似物被用于制备本发明的抗巴比妥类药物抗血清,用于免疫测定方法。还提供了用于制备荧光类似物和免疫原性类似物的中间体。此外,还提供了测试套件,包括根据本发明的荧光追踪剂和抗血清,用于通过荧光极化免疫测定分析生物样本中巴比妥类药物的存在。此外,还提供了一种改进的血清中分析物的免疫测定方法,其中使用传输手段(如移液器)重复将不同样本转移到测定系统中。在该改进中,使用一种特定成分的水溶液,包括二甲基亚砜和碱性卤化物,用于在转移之间清洗传输手段。