对硝基偶氮氯膦与钇显色反应的研究及矿石中钇的测定  

Reaction of Yttrium with p-Nitrochlorophosphonazo and The Spectrophotometric Determination of Yttrium in Minerals

作　　者：宋金如[1] 曾锋[1] 潘教麦[2] Song Jin-ru;Zeng Feng;Pan Jiao-mai

机构地区：[1]华东地质学院分析系 [2]华东师范大学

出　　处：《岩矿测试》1987年第3期176-178,I0004,共4页Rock and Mineral Analysis

摘　　要：对硝基偶氮氯膦(CPA-PN)是钇的灵敏显色剂,在吸光光度分析中已得到广泛的应用。本文研究了聚乙烯醇存在下,对硝基偶氮氯膦与钇的显色反应。结果表明,在pH1.25的盐酸介质中,CPA-PN与钇反应生成β型络合物。Yttrium reacts with p-nitrochlorophosphonazo to form a 1:3β-type complex with an absorption maximum at 730nm.The molar absorptivity was found to be 7.42×10^(4)L·mol^(-1)·cm^(-1)at 730nm.The complex was stable for at least 13hrs.Beer’s law was obeyed for 7-17μg of yttrium in 25ml of solution.Yttrium can be determined in rare earth mixtures in the presence of polyvinyl alcohol.The results were satisfactory.

关 键 词：显色反应 对硝基偶氮氯膦 盐酸介质 钇的测定 聚乙烯醇 CPA 显色剂 反应生成 

分 类 号：O65[理学—分析化学]