Simultaneous separation of yttrium and lanthanide ions by isotachophoresis

被引：18

作者：

Hirokawa, T

Hashimoto, Y

机构：

[1] Applied Physics and Chemistry, Faculty of Engineering, Hiroshima University, Higashi-hiroshima 739

来源：

JOURNAL OF CHROMATOGRAPHY A | 1997年 / 772卷 / 1-2期

关键词：

complexation; buffer composition; yttrium; lanthanides; rare earth ions;

D O I：

10.1016/S0021-9673(97)00055-1

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

An operational electrolyte system was developed for the isotachophoretic separation of fifteen rare-earth elements (yttrium and lanthanides except for Pm) by adding a helping complexing agent to an alpha-hydroxyisobutyric acid (HIBA) electrolyte system. As a result of testing several helping agents such as malonic acid, malic acid, tartronic acid and glycolic acid, the optimized leading electrolyte was a 20-mM ammonia solution containing 2 mM malonic acid and 7.5 mM HIBA (pH 4.8, 2-ethylbutyric acid buffer). The terminator was a 20-mM carnitine hydrochloride. According to the stability constants of rare-earth-malonate complexes evaluated by isotachophoretic method, the successful separation was due to the smaller stability constants of Y-malonate complexes compared with those of the medium lanthanide elements to be separated.

引用

页码：357 / 367

页数：11

共 15 条

[11]

Perrin D. D., 1979, IUPAC CHEM DATA SERI, V22

[12]

POWELL JE, 1964, RARE EARTH RES, V2, P509

[13] ON THE COMPLEX CHEMISTRY OF THE TERVALENT RARE EARTH IONS .2. THE ACETATE SYSTEMS OF PRASEODYMIUM, SAMARIUM, DYSPROSIUM, HOLMIUM, ERBIUM AND YTTERBIUM [J].