摘要
在酸性介质中,痕量Rh(Ⅲ)的存在对KBrO3 氧化二溴对甲偶氮羧的褪色反应有明显的催化作用.据此褪色反应建立了测定痕量铑的动力学催化光度分析方法.铑检出限为 0.001μg·mL-1,在 0.002~0.050μg·mL-1范围内符合比耳定律.反应在水相中进行,重现性好,用于铂 铑催化剂中铑的测定,结果满意.
A new catalytic spectrphotometric method for the determination of Rhodium(Ⅲ) has been established on the catalytic action of Rh(Ⅲ) on the oxidative fading chlorophosphonazo with KBrO_3 in acid medium.The method offers the advantages of simplicity,rapidity and sensitivity.Beer’s law is obeyed from 0.002 to 0.050μg·mL^(-1) and the determination limit is 0.001μg·mL^(-1).The catalytic reaction occurs in water phase.This method has been used to determine Rh 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2期43-44,共2页
Journal of Gansu Lianhe University :Natural Sciences
关键词
铑
二溴对甲偶氮羧
催化分光光度分析
Rhodium
Dibromo-p-methylcarboxylazo
catalyze-spectrophotometry