铑(Ⅲ)-KIO_4-对乙酰基偶氮羧催化分光光度法测定微量铑  

Catalytic spectrophotmetric determination of rhodium by rhodium(Ⅲ)-KIO_4-p-acetylcarboxylazo system

作　　者：王传娥[1] 寇宗燕[1] 

机构地区：[1]甘肃联合大学化学系,甘肃兰州730000

出　　处：《冶金分析》2003年第2期52-53,共2页Metallurgical Analysis

摘　　要：在酸性介质中铑(Ⅲ)对KIO4氧化对乙酰基偶氮羧的褪色反应有明显的催化作用,据此,确定了最佳反应条件,建立了测定微量铑的催化光度分析法。铑在5 0～100μg/L范围内符合比尔定律,反应在水相中进行,用于铂-铑催化剂中铑的含量测定,结果满意。A new catalytic spectrophotometric method for the determination of rhodium has been established based on the catalytic action of Rh(Ⅲ) on the oxidative fading reaction between pacetylcarboxylazo and KIO4 in acid mediumThe method offers the advantages of simplicity,rapidity and sensitivityBeer's law is obeyed in the range of 50-1000μg/LThe method bas been applied to the determination of rhodium in platinum-rhodium catalyst with satisfactory results

关 键 词：对乙酰基偶氮羧 铑 催化分光光度法 测定 

分 类 号：O657.3[理学—分析化学]