铑(Ⅲ)-溴酸钾-二溴羧基偶氮胂催化分光光度法测定微量铑  

Discoloring Spectrophotomeric Deterination of Rhodium(Ⅲ) by Rhodium(Ⅲ)-Potassium Bromate-Dipromocarboxyarsenazo

作　　者：寇明泽[1] 南春雨[1] 寇宗燕[1] 

机构地区：[1]甘肃联合大学化工学院,甘肃兰州730000

出　　处：《甘肃联合大学学报（自然科学版）》2007年第4期60-61,39,共3页Journal of Gansu Lianhe University :Natural Sciences

摘　　要：报道了以铑（Ⅲ）催化溴酸钾氧化二溴羧基偶氮胂的褪色反应,建立了一种在水相中直接测定微量铑的催化光度分析法.铑含量在0.0~10.0μg·L^-1范围内符合比耳定律.用于铂-铑催化剂中铑的测定,结果满意.A new discoloring spectrophotometric method for the determination of rhodium（Ⅲ） is established based on its catalytic effect on the oxidation of dipromocarboxyarsenazo in acid medium, Beer＇s law is obyed in the concentration range of 0. 0~10. 0μg · L^-1. The method is applied to the determination of trace amount of rhodium（Ⅲ） in platinum-rhodium catalyst with satisfactory results.

关 键 词：铑 二溴羧基偶氮胂 催化分光光度法 

分 类 号：O657.32[理学—分析化学]