钇-对乙酰基偶氮氯膦(CPApA)β型显色反应的研究及其应用  

Study on the β type reaction of yttrium with p acetylchlorophosphonazo(CPApA) and the spectrophotometric determination of yttrium

作　　者：刘双成[1] 徐钟隽[1] 潘教麦[1] 

机构地区：[1]华东师范大学化学系

出　　处：《化学试剂》1997年第3期137-140,共4页Chemical Reagents

摘　　要：在０．０４～０．１２ｍｏｌ／Ｌ盐酸介质中，钇与对乙酰基偶氮氯膦（ＣＰＡｐＡ）形成一组成比为１∶２的β型配合物，其最大吸收波长为７２５ｎｍ，表观摩尔吸光系数为１．３４×１０５Ｌ·ｍｏｌ－１．ｃｍ－１。用标准加入回扣法，钇含量在０～８μｇ／２５ｍＬ范围内符合比耳定律。该法有很高的选择性，大量常见离子及１０～１倍的稀土不干扰测定，可不经分离直接测定轻稀土混合物及镍基、镁基等合金中的钇，结果令人满意。Yttrium reacts with p acetylchlorophosphonazo to form a 1∶2 β type complex in hydrochloric acid medium, having a maximum absorption at 725 nm with an apparent molar absorptivity of 1.34×10 5L·mol -1 ·cm -1 .By using standard addition deduction method, the determination range is 0～8μg Y/25 mL.The present method is very sensitive and selective, most foreign ions in considerable amounts and 10～1 fold amounts of rare earth are tolerable.Satisfactory results can be obtained in the determination of microamounts of yttrium in rare earth mixtures and alloys without separation.

关 键 词：对乙酰基 偶氮氯膦 钇 分光光度法 CPApA 

分 类 号：O614.322[理学—无机化学]