SEPARATION OF THORIUM, URANIUM AND RARE-EARTH ELEMENTS WITH 4,6-TRIBROMOPHENYL)AZO]-NAPHTHALENE-3,6-DISULFONIC ACID BY CAPILLARY ELECTROPHORESIS

Citation
Bf. Liu et al., SEPARATION OF THORIUM, URANIUM AND RARE-EARTH ELEMENTS WITH 4,6-TRIBROMOPHENYL)AZO]-NAPHTHALENE-3,6-DISULFONIC ACID BY CAPILLARY ELECTROPHORESIS, Analytica chimica acta, 358(2), 1998, pp. 157-162
Citations number
12
Categorie Soggetti
Chemistry Analytical
Journal title
ISSN journal
00032670
Volume
358
Issue
2
Year of publication
1998
Pages
157 - 162
Database
ISI
SICI code
0003-2670(1998)358:2<157:SOTUAR>2.0.ZU;2-#
Abstract
The separation of thorium, uranium and rare-earth elements (RE) as the ir 4,6-tribromophenyl)azo]-naphthalene-3,6-disulfonic acid complexes b y capillary electrophoresis with direct UV-Vis detection is presented in this paper. The influences of pH value and concentration of electro lyte, voltage and surfactant on separation were investigated and optim ized. Under the selected conditions (30 mM NaAc-HCl buffer containing 0.5 mM cetyltrimethylammonium bromide and 0.2 mM chelating reagent, pH 4.30, 12 KV, 635 nm as detection wavelength), the coexisted ions were separated within 4 min, and limits of detection of 37, 39, 199 mu g 1 (-1) for RE, thorium, uranium with a linear dynamic range of over 2 or ders of magnitude were achieved, respectively. (C) 1998 Elsevier Scien ce B.V.