钌(Ⅲ)-过碘酸钾-对乙酰基偶氮羧-P体系催化分光光度法测定微量钌的研究  

Catalytic Spectrophotometric Determination of Ruthenium in the Ruthenium(Ⅲ)-Potassium Periodate-p-Acetylcarboxylazo-P System

作　　者：刘锡林[1] 寇宗燕[1] 陈兴国[2] 胡之德[2] 

机构地区：[1]甘肃教育学院化学系,兰州730000 [2]兰州大学化学系

出　　处：《分析化学》1992年第3期345-347,共3页Chinese Journal of Analytical Chemistry

基　　金：甘肃省自然科学基金

摘　　要：本文发现钌(Ⅲ)对KIO_4氧化对乙酰基偶氮羧-P褪色反应有显著的催化作用,探讨了测定微量钌的催化分光光度法的最佳条件。其表观摩尔吸光系数ε_(530)=6.16×10~5L·mol^(-1).cm^(-1),在0.1～1.5μg/10ml范围内符合比耳定律,应用于贵金属精矿中钌的含量测定,结果满意。A new catalytic spectrophotometric method for the determination of ruthenium was established based on the catalytic action of Ru(Ⅱ) on the oxidative fading between 3-(4-Carboxylazobenzene)-6-(4-acetylazobenzene)-4,5-dihydroxyl-2,7-naphthyl disulfonic acid (p-acetylcarboxylazo-P)and KIO_4 in the 0.2mol/L H_2SO_4 medium at boiling water bath.The method offers the advantages of simplicity, rapidity and sensitivity. Beer's law is obeyed in the range from 0.01 to 0.15μg/ml, the molar absorptivity is approximately 6.16×10~5L·mol^(-1)·cm^(-1) at 530nm.

关 键 词：钌 过碘酸钾 催化光度法 

分 类 号：O614.821[理学—无机化学]