摘要
本文初步探讨了稀土的DBC偶氮胂络合物与CyDTA取代反应机理。对于不同显色剂和取代剂进行了选择,建立了测量钐、钆的最佳反应体系。用速差动力分析法进行了钐钆富集物中钐、钆的同时测定。速差动力分析结果与ICP发射光谱法结果相符。本法测定钐、钆相对含量在1:2～4:1范围,误差约为10％。
This paper deals preliminarily with the substitution reaction mechanism of RE(DBC) 3(DBC = 2-(2-arsenophenylazo)-7-(2, 6-dibromo-4-chlo-rophenylazo)-1,8-dihydroxynaphthalene-3,6-disulfonic acid) with CyDTA based on the experimental facts and theory deduction. A kinetic reaction system for simultaneous determination of Sm and Gd was established by choosing the best substituent and complexing agent from several aminocarboxylic acids and polyhalidarsenazoes. Under the suitable conditions Sm and Gd in their concentrated material were determined simultaneously in this kinetic reaction system. The result agrees satisfactorily with that obtained by JCP-AES. The synthetic samples of Sm and Gd mixture with a content ratio in the range of 1:2-4: 1(Sm:Gd) were determined by this method. The error of it is about 10%. It is predictable that the method would be used for a control of procedure in the rare earth production.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1989年第6期586-590,共5页
Chemical Journal of Chinese Universities
基金
中国科学院自然科学基金
关键词
钐
钆
同时测定
速差动力学测定
CyDTA
光度法
DBC偶氮络合物
Simultaneous determination of Sm and Gd, Kinetic method of rare earth, Rate differential determination of single rare earth
