Ru(Ⅲ)-KIO_4-偶氮氯膦体系催化分光光度法测定微量钌

Catalytic Spectrophotometric Determination of Ruthenium(Ⅲ) Using of Ru(Ⅲ)-KIO_4-Chlorophosonazo Ⅲ System

在酸性介质中 ,微量 Ru( )的存在对 KIO4氧化偶氮氯膦 的褪色反应有明显的催化作用 .据此褪色反应建立了微量钌的催化光度分析法 ,方法的检出限为 2μg· L-1 ,Ru( )在 2 .0～35.0 μg· L-1之间有良好的线性关系 .反应在水相中进行 ,应用于贵金属精矿中钌的测定 ,结果满意 .

A new catalytic spectrophotometric method for the determination of ruthenium has been established on the catalytic action of Ru(Ⅲ) on the oxidtive fading chlorophosponazo Ⅲ with KIO 4 in acid medium. The method offers the advantages of simplicity, rapidity and sensitivity. The determination limit is 2.0 μg·L -1, beers law obeyed from 2.0 to 35.0 μg·L -1. The catalytic reaction occurs in water phase. This method has been used to determines Ru in concentrates with satisfactory result.