Ir(Ⅳ)-对氯偶氮氯膦-KIO_4催化分光光度法测定微量铱的研究

Catalytic Spectrophotometric Determination of Ir(Ⅳ) by Decolorizing Reation with Ir(Ⅳ)-KIO_4-CPA-PC

在硫酸介质中铱对高碘酸钾氧化对氯偶氮氯膦的褪色反应有明显的催化作用.研究了此催化反应的最佳条件及微量铱的测定方法.其检出限为0.2μg·10mL-1,铱含量在0.3～3.0μg·10mL-1范围内线性关系良好.该法在铱合成样的测定中获得满意结果.

A spectrophotometric method for the determination of Ir(Ⅳ) has been established on the catalytic action of Ir(Ⅳ) on the oxidatic fading CPA-PC with KIO_4 in acid medium .The method offers the advantages of simplicity,rapidity and sensitivity .Beer' slaw is obeyed from 0.3～3.0μg·10mL^(-1) and the determination limit is 0.2μg·10mL^(-1).