A multilayer analytical element for determining a level of an analyte on a substrate and adapted for use with hydrogen peroxide and an affinity-enzymatic compound of formula A—C—B, wherein A is a detecting agent having affinity for the analyte, B is an enzymatic visualizing agent consisting of peroxidase and C is a binding agent linking the detecting and visualizing agents together. The multilayer analytical element of the invention comprises a solid support and a hydrophilic layer thereon, the hydrophilic layer being formed of gelatin, polyvinyl alcohol or a mixture thereof and containing a developing agent and a hydrophobic color-producing agent in a total amount of 5 to 30 weight %, the developing agent and the color-producing agent being present in a weight ratio of 1:0.3 to 1:3.0. The developing agent is capable of undergoing oxidation by the hydrogen peroxide in the presence of the peroxidase bound via the binding and detecting agents to the analyte on the substrate, whereby the developing agent in oxidized form reacts with the color-producing agent to form a colored product having a color indicative of the level of analyte.
一种多层分析元件,用于测定基底上被分析物的含量,并可与
过氧化氢和式 A-C-B 的亲和酶化合物一起使用,其中 A 是对被分析物具有亲和力的检测剂,B 是由
过氧化物酶组成的酶显像剂,C 是将检测剂和显像剂连接在一起的结合剂。本发明的多层分析元件包括一个固体支架和其上的亲
水层,亲
水层由明胶、聚
乙烯醇或它们的混合物构成,并含有显影剂和疏
水性
显色剂,总量为 5-30 重量%,显影剂和
显色剂的重量比为 1:0.3 至 1:3.0。在
过氧化物酶的存在下,显影剂能被
过氧化氢氧化,
过氧化氢酶通过结合剂和检测剂与基质上的分析物结合,氧化后的显影剂与
显色剂反应,形成有色产物,其颜色指示分析物的含量。