An immunoassay method and analytical elements for detecting carbamazepine drugs, for example, in body fluids, is described. The immunoassay method comprises: (A) contacting a liquid sample, containing carbamazepine, with a labeled carbamazepine analogue in the presence of antibodies for carbamazepine under conditions that promote the formation of carbamazepine/antibody immunocomplexes; and (B) determining the quantity of the drug in the liquid by measuring bound or unbound labeled drug analogue; characterized in that the labeled carbamazepine comprises: (1) a label, of the type used in immunoassays, having an amine or sulfhydryl group; (2) a carbamazepine nucleus; and (3) a linking chain linking the carboxamide group of the carbamazepine nucleus to the label, said linking chain having about 4 to about 40 atoms consisting of: (a) alkylene groups; and (b) heterocyclic ring groups, each group being joined into the linking group through chemical groups selected from (a) esters, (b) amides, (c) heteroatoms selected from --O--, --S--, and --NR--; wherein each R independently represents hydrogen or C.sub.1 to C.sub.6 alkyl; and (d) carbonyl groups. The elements of the invention are preferably dry, thin film analytical elements comprising a labeled carbamazepine analogue as described.
本发明描述了一种检测体液中
卡马西平药物的免疫测定方法和分析元素。该免疫测定方法包括:(A)在
卡马西平抗体存在的条件下,将含有
卡马西平的液体样品与标记的
卡马西平类似物接触,促进
卡马西平/
抗体免疫复合物的形成;以及(B)通过测量结合或未结合的标记药物类似物来确定液体中药物的数量。其特征在于标记的
卡马西平包括:(1)一种在免疫测定中使用的标记,具有胺基或
硫醇基;(2)一个
卡马西平核;和(3)将
卡马西平核的羧酰胺基与标记连接的连接链,该连接链具有约4到约40个原子,包括:(a)烷基链;和(b)杂环环基,每个基团通过从(a)酯,(b)酰胺,(c)从--O--,--S--和--NR--选择的杂原子结合到连接基团中;其中每个R独立地表示氢或C.sub.1到C.sub.6烷基;和(d)羰基基团。本发明的元素最好是干燥的薄膜分析元素,包括如上所述的标记的
卡马西平类似物。