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.
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
关键词
铑
二溴硝基偶氮氯膦
褪色光度法
rhodium
2-(4-nitro-2,6-dibromophenyl)azo-6-(4-chloro-2-phosphonophenyl)azo-4,5-dihyaroxy-2,7-naphthalene diealfonic acid
discoloring spectrophotometric
