贵金属元素电分析化学研究(Ⅱ)——大量铱中微量铑的极谱溶出法测定

高等学校化学学报 ›› 1985, Vol. 6 ›› Issue (2): 126.

贵金属元素电分析化学研究(Ⅱ)——大量铱中微量铑的极谱溶出法测定

张玉祥, 王春明, 王平, 樊买虎

兰州大学化学系

收稿日期:1984-01-12 出版日期:1985-02-24 发布日期:1985-02-24

Electrochemical Studies of Noble Elements(Ⅱ)——Determination of Micro-Rhodium in the Macro Amount of Iridium by ASV

Zhang Yuxiang, Wang Chunmin, Wang Ping, Fan Maihu

Department of Chemistry, Lenzhou University, Lanzhou

Received:1984-01-12 Online:1985-02-24 Published:1985-02-24

摘要/Abstract

摘要： 对于微量铑的电化学测定,一般多用极谱氢催化波法和示波极谱法。文献提出用伏安法测定Rh(Ⅲ),但灵敏度低,只能测至4×10^-5M。等在Hg₂(NO₃)₂的1MHCl中得到了Rh(Ⅲ)的反相溶出峯,其灵敏度达10^-7M,但未用于实际分析。

Abstract: In this paper, the methods of separation macro-lridium and determination of micro-rhodium have been studied.By using home-made 15% of tri-(6,7,8)alkyl-phosphine oxide-benzene solution for extracting in 4N HCl, we have been successively separated the macro-lridum apart from micro-rhodium.The extraction rate for once lies in the range 97-99%.We have also found the optimum electrolytic system of 0.1N HCl-0.02Nethylene diamine-2.5×10^-6M HgCl₂(pH= 1.4) for determination of micro amount of rhodium (Ⅲ) by anodic stripping voltammatry (ASV) on glass carbon electrode.The limit of detection as low as to 10 ppb may be achieved.

TrendMD:

张玉祥, 王春明, 王平, 樊买虎. 贵金属元素电分析化学研究(Ⅱ)——大量铱中微量铑的极谱溶出法测定. 高等学校化学学报, 1985, 6(2): 126.

Zhang Yuxiang, Wang Chunmin, Wang Ping, Fan Maihu. Electrochemical Studies of Noble Elements(Ⅱ)——Determination of Micro-Rhodium in the Macro Amount of Iridium by ASV. Chem. J. Chinese Universities, 1985, 6(2): 126.