摘要
研究了在ｐＨ９．２～ｐＨ９．５的ＮＨ３－Ｎａ２Ｂ４Ｏ７介质中，稀土与百里香酚酞的络合物极谱波，波高与镧（Ⅲ）量在４．０×１０－７～３．６×１０－６ｍｏｌ／Ｌ范围内成线性关系。方法已用于稀土钢中微量稀土的测定。
In this paper,the adsorptive complex wave of rare
earths with thymolphthalexonl(TP) and the polarographic behavior of TP were investigated.In
NH 3 Na 2B 4O 7 buffer solution at pH9.2 the complex of rare earths with TP exhibits a well
defined wave in single sweep polarography with a derivative peak potential of E P=-1 02 V(
vs .SCE),the wave height is proportional to the concentration of La 3+ in the range of 4×10
-7 ～3 6×10 -6 mol/L.This method has been applied to the determination of trace rare earth
elements in rare earths steel with satisfactory results.
出处
《分析试验室》
CAS
CSCD
1999年第2期80-82,共3页
Chinese Journal of Analysis Laboratory
关键词
测定
配合吸附波
极谱法
稀土
稀土钢
Rare earths
trace
determination
adsorptive complex wave
thymolphthalexone
rare earths steel
