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化学学报
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化学学报 ›› 1982, Vol. 40 ›› Issue (7): 621-628. 上一篇    下一篇

论文

稀土元素的电分析化学研究——Ⅳ.镱-硝酸根(或亚硝酸根)-氯化铵中的极谱催化波

商小霞, 张立群   

  1. 北京大学化学系
  • 投稿日期:1980-12-29 发布日期:2013-06-03
  • 通讯作者: 商小霞

STUDIES ON THE ELECTROANALYTICAL CHEMISTRY OF RARE EARTHS IV. THE CATALYTIC WAVE OF Yb3+-NO3- (or NO2-)-NH4Cl SYSTEM

GAO XIAO-XIA, ZHANG LI-QUN   

  1. Department of Chemistry, Peking University
  • Received:1980-12-29 Published:2013-06-03

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645

被引次数

4

多价阳离子与NO3-或NO2-作用产生的灵敏的催化电流可用于微量金属离子或NO3-,NO2-的极谱测定,但对产生催化电流的机理并不十分清楚,本文讨论了Yb3+-NO3-(或NO2-)-NH4Cl体系,证明有两种不同性质的电流同时存在.当[Yb3+]远小于[NO3-]或[NO2-]时,以平行催化电流为主;而当[Yb3+]远大于[NO3-]或[NO2-]时则以NO3-或NO2-的催化电还原电流为主要成分. 本文改进了原来提出的一些实验条件,使镱在直流极谱上的测定下限达5×10-8M.

The catalytic system Yb3+-NO3-(or NO2-)-NH4Cl has been studied cg early as 1975.In do polarography Yb3+ can be detooted as low as 5×10-5 M under optimal condition, and a linear relationship holds between the wave heights and the concentrations of 1×10-7-1×10-6 M Yb3+.The method has been used to determine micro amount of Yb in ores without the interference of other rare earths.