5-[2-(4-氯苯酚)偶氮]-若丹宁与铂(Ⅱ)的显色反应研究及应用  

A Study on the Coluor Reaction of Platinum(Ⅱ) with a New Reagent 5 2 (4 Chlorophenol)azo Rhodanine and Its Application

作　　者：谭秀芳[1,2] 潘教麦[1,2] 

机构地区：[1]新疆医学院基础部化学教研室 [2]华东师范大学化学系

出　　处：《分析科学学报》1998年第3期231-233,共3页Journal of Analytical Science

摘　　要：研究了新显色剂５－［２－（４－氯苯酚）偶氮］－若丹宁与铂（Ⅱ）的显色反应．在Ｈ２ＳＯ４－Ｈ３ＰＯ４介质中和ＣＴＭＡＢ存在下，试剂与Ｐｔ（Ⅱ）形成有色配合物，λｍａｘ位于４２６ｎｍ，摩尔吸光系数为３．２４×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，Ｐｔ（Ⅱ）量在４．００～１０μｇ／２５ｍＬ符合比耳定律，方法用于铂催化剂中铂的测定，获得较好的结果．In this paper,the colour reaction of platinum (Ⅱ)with a new reagent 5 2 (4 Chloropheol) azo rhodanine has been studied.In the H 2SO 4 H 3PO 4medium,platinum(Ⅱ)react with the reagent in the presence of CTMAB to form a colour complex which has an absorption maximum at 462 nm. The molar absorptivity is 3.24×10 5 L·mol -1 ·cm -1 .Beers law is obeyed for 4￣10 μg of platinum in 25mL of solution . The method has been applied to the determination platinum in platinum catalysts with satisfactory results.

关 键 词：若丹宁 分光光度法 铂 分析 显色反应 

分 类 号：O614.826[理学—无机化学]