Ir(IV)—罗丹明B—高碘酸钾—硫酸新体系催化光度测定超痕量铱  

A New System of Ir(Ⅳ)-Rhodamine B-KIO_4-H_2SO_4 for Catalytic Spectrophotometric Determination of Supertrace Iridium

作　　者：蒋治良[1] 戴国忠[1] 

机构地区：[1]广西师范大学化学系,桂林541004

出　　处：《贵金属》1992年第1期54-58,共5页Precious Metals

摘　　要：在硫酸介质及加热条件下,Ir(Ⅳ)对高碘酸钾氧化罗丹明B这一褪色反应有强烈的催化作用,藉自来水冷却中止反应,讨论催化光度测定超痕量铱的影响因素,建立一个检测限和线性范围分别为0.025ng/ml和0.05～3.0ng/ml铱的催化光度新方法。The strong catalytic action of Ir (Ⅳ) on the oxidative fading reaction of Rhodamine B with KIO_4 in H_2SO_4 medium and under heating condition was studied.The factors to influence the catalytic spectrophotometric determination of supertrace iridium were discussed. A new method for the catalytic spectrophotometric determination of Ir range from 0.05 to 3.0 ng/ml and the detecting limit 0.025 ng/ml was established.

关 键 词：铱 分光光度法 催化分析 痕量分析 

分 类 号：TF801.3[冶金工程—有色金属冶金]