Capillary electrophoretic estimation of sulfate stability constants of metal ions and determination of alkali and alkaline earth metals in waters

被引：44

作者：

Havel, J ^{[1
]}

Janos, P ^{[1
]}

Jandik, P ^{[1
]}

机构：

[1] THERMO BIOANAL CORP,SAN JOSE,CA 95161

来源：

JOURNAL OF CHROMATOGRAPHY A | 1996年 / 745卷 / 1-2期

关键词：

water analysis; stability constants; buffer composition; metal cations; sulfate; alkali metals; alkaline earth metals;

D O I：

10.1016/0021-9673(96)00276-2

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

We studied the influence of sulfate concentration on the effective mobilities of mono-, di- and tervalent ions and developed a method for the determination of sulfate stability constants. Relative migration times of several cations were determined. Capillary electrophoresis with indirect detection using 4 mmol/l copper(II) sulfate, 18-crown-6 and formic acid in background electrolyte was then applied to the determination of the metal ions in mineral and tap waters samples. The results were compared with those of ion chromatography. The CE detection limits were estimated [signal/noise ratio (S/N)=3] in the range from 0.59 (for Li) to 12.9 mg/l (for Ba).

引用

页码：127 / 134

页数：8

共 34 条

[1] INDIRECT FLUOROMETRIC DETECTION OF ALKALI AND ALKALINE-EARTH METAL-IONS IN CAPILLARY ZONE ELECTROPHORESIS WITH CERIUM(III) AS CARRIER ELECTROLYTE [J].