SEPARATION OF CHLORIDE ISOTOPES BY CAPILLARY ELECTROPHORESIS BASED ON THE ISOTOPE EFFECT ON ION MOBILITY

被引：43

作者：

LUCY, CA

MCDONALD, TL

机构：

[1] Department of Chemistry, The University of Calgary, 2500 University Drive NW, Calgary, Alberta

来源：

ANALYTICAL CHEMISTRY | 1995年 / 67卷 / 06期

关键词：

D O I：

10.1021/ac00102a009

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Near baseline resolution is obtained for chloride isotopes using capillary zone electrophoresis. Ultrahigh resolution is achieved by adjusting the electroosmotic now to be equal but opposite to the migration of the chloride ions. The separation was optimized with respect to electrolyte concentration, buffer composition, electrolyte pH, and applied voltage. Optimum separation was achieved using an electrolyte composed of 5 mM chromate and 3 mM berate at pH 9.7 (25 degrees C) and an applied voltage of 20 kV. The observed chloride isotope ratio was 3.197, which agrees with the known value within the 95% confidence interval. The relative standard deviation was 2.0%.

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页码：1074 / 1078

页数：5

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