逆流色谱分离镅(Ⅲ)和铕(Ⅲ)的研究  

Separation of Americium and Europium by High Speed Countercurrent Chromatography

作　　者：吴剑峰[1] 金玉仁[1] 许启初[1] 王世联[1] 张利兴[1] 

机构地区：[1]西北核技术研究所,西安710024

出　　处：《分析化学》2006年第9期1311-1314,共4页Chinese Journal of Analytical Chemistry

摘　　要：选择0.1 mol/L NaC lO4为流动相,以二氯苯基二硫代膦酸的二甲苯溶液为固定相,研究了萃取剂浓度、流动相pH及流动相流率对逆流色谱(CCC)分离Am3+和Eu3+效果的影响。结果表明,在实验条件下,两者的分离系数随着固定相中的萃取剂浓度增加、流动相的pH升高而增大;降低流动相流率后可明显改善分离效果。通过改变分离条件,Am3+和Eu3+可基本上实现相互分离,两者间的分离系数和分离效率分别达到2.87和0.74。The effects of concentration of extractant（0.05 mol/L, 0. 1 mol/L, 0. 15 mol/L） ,pH （3.08, 3.14, 3.2）and the flow rate of mobile phase （0.25 mL/min, 0.5 mol/L, 0.75 mol/L） on the separation efficiency of Am and Eu by high speed countercurrent chromatography （ HSCCC ） were investigated using dichlorophenyldithiophosphinic acid in xylene as the stationary phase and 0.1 mol/L NaClO4 as mobile phase. The results show that the separation factor increases with the increasing of the concentration of extractant and the pH value of the mobile phase, furthermore, minishing the flow rate of the mobile phase can also improves the separation efficiency between Am and Eu. Mutual separation between Am^3 ＋ and Eu^3 ＋ can be accomplished by optimizing the separation condition, the separation factor and separation efficiency between Am^3 ＋ and Eu^3 ＋ can reach 2.87 and 0.74, respectively.

关 键 词：逆流色谱 镅 铕 分离 

分 类 号：O657.7[理学—分析化学]