SEPARATION AND INDIRECT DETECTION BY CAPILLARY ZONE ELECTROPHORESIS OF PPB (W/W) LEVELS OF ALUMINUM IONS IN SOLUTIONS OF MULTIPLE CATIONS

被引：20

作者：

BARGER, WR

MOWERY, RL

WYATT, JR

机构：

[1] Chemistry Division, Naval Research Laboratory, Washington, DC 20375, Code 6170

来源：

JOURNAL OF CHROMATOGRAPHY A | 1994年 / 680卷 / 02期

关键词：

D O I：

10.1016/0021-9673(94)85166-2

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

Solutions of multiple cations in aqueous solutions at concentrations as low as 200 ppb were analyzed by capillary zone electrophoresis. Aluminum ions were cleanly separated from Li+, K+, Ca2+, Cr3+, Zn2+, Cu2+, and other ions less than 6 min after injection of the solution on a 50 cm x 50 mu m I.D. uncoated fused-silica capillary column at 15 kV. Indirect detection at 204 nm was carried out using a pH 2.8 background electrolyte containing 5.2 mM ephedrine as a UV-absorbing co-ion and 4.7 mM alpha-hydroxyisobutyric acid as a complexing counter ion. Mobilities for Al3+ and 14 other complexed cations were determined for this electrolyte.

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页码：659 / 665

页数：7

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