高效毛细管电泳测定混合氯化稀土中的稀土元素  

Determination of Rare Earth Metal Ions of Mixed Rare Earth Chloride with Capillary Ion Electrophoresis

作　　者：杨永坛[1] 康经武[1] 李菊白[1] 欧庆瑜[1] 袁敏[2] 

机构地区：[1]中国科学院兰州化学物理研究所 [2]华南师范大学化学系

出　　处：《分析测试技术与仪器》1997年第2期80-85,共6页Analysis and Testing Technology and Instruments

基　　金：甘肃省自然科学基金

摘　　要：研究了在以含有紫外吸收的咪唑为背景电解质和α－羟基异丁酸为络合剂的缓冲液体系中，用毛细管电泳（ＣＥ）间接紫外法检测稀土离子的方法，讨论了各操作条件对稀土离子分离的影响。在选定的条件下，１４种稀土离子混合物在１０ｍｉｎ内完成分离，最低检测量可达７．８×１０－１４ｍｏｌ，并在该体系中采用内标标准曲线法测定了混合氯化稀土样品中Ｌａ、Ｃｅ、Ｐｒ、Ｎｄ、Ｓｍ的含量，测定结果令人满意。The separation of rare earth metal ions by capillary ion electrophoresis in the presence of imidazole as UV-absorbing background electrolyte and α-hydroxyisobutyric acid as the complexing agent with indirect UV absorbance was investigated. Several experimental condition influenced on separation was atudied. Using 0.02mol/L imidazole containing 8×10 -3 /L α-hydroxyisobutyric acid(pH3.4) as a carrier electrolytr, the fourteen rare earth metal iorns were separated within 10min under a positive voltage of 10.0kV.The content of La、Ce、Pr、Nd、Sm in rare earth chloride sample from Gansu Rare Earth Company was determined successfully with this method.

关 键 词：毛细管电泳 稀土离子 咪唑 氯化稀土 轻稀土 

分 类 号：X132[环境科学与工程—环境科学] O614.33[理学—无机化学]