Determination of chlorate at low μg/1 levels by ion-chromatography with postcolumn reaction

被引：24

作者：

Nowack, B ^{[1
]}

von Gunten, U ^{[1
]}

机构：

[1] EAWAG, CH-8600 Dubendorf, Switzerland

来源：

JOURNAL OF CHROMATOGRAPHY A | 1999年 / 849卷 / 01期

关键词：

water analysis; drinking water; disinfection; chlorate; inorganic anions;

D O I：

10.1016/S0021-9673(99)00564-6

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

A new method for the determination of low concentrations of chlorate in natural waters is described. Chlorate is analyzed by ion-chromatography followed by an osmate-catalyzed postcolumn reaction of chlorate with iodide and UV-detection of triiodide. The new osmate catalysis allows to carry out the oxidation of iodide by chlorate at pH 3 instead of 6 M HCl for the uncatalyzed reaction. A detection limit of 5 nM (0.4 mu g/l) chlorate is achieved. The method also allows the simultaneous determination of chlorite, bromate, and nitrite at the low mu g/l level. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：209 / 215

页数：7

共 19 条

[1] Determination of iodide and iodate by ion chromatography with postcolumn reaction and UV/visible detection [J].