铑(Ⅲ)-溴酸钾-二溴硝基偶氮氯膦褪色光度法测定微量铑  

Discoloring Spectrophotomeric Determination of Rhodium(Ⅲ) by Rhodium(Ⅲ)-Potassium Bromate-2-(4-nitro-2,6-dibromophenyl)azo-6-(4-chloro-2-Phosphonophenyl)azo-4,5-dinyaroxy-2,7-naphthalene Dieulfonie Acid System

作　　者：寇明泽[1] 王艳梅[1] 任荣[1] 寇宗燕[1] 

机构地区：[1]甘肃联合大学理工学院,甘肃兰州730000

出　　处：《甘肃联合大学学报（自然科学版）》2005年第3期41-42,共2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硝基偶氮氯膦的褪色反应,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0.0～12.0μg·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) has been established based on its catalytic effect on the oxidation of 2-(4-nitro-2,6-dibromophenyl)azo-6-(4-chloro-2-Phosphonophenyl)azo-4,5-dihyaroxy-2,7-naphth-alene dieulfonie acid in acid medium .Beer’s law is obyed in the concentration range of 0.0～12.0μg ·L^(-1). The method has been applied to the determination of trace amount of rhodium(Ⅲ) in platinum-rhodium catalyst with satisfactory results.

关 键 词：铑 二溴硝基偶氮氯膦 褪色光度法 

分 类 号：O657.32[理学—分析化学]