Comparison of three post-column reaction methods for the analysis of bromate and nitrite in drinking water

被引:18
作者
Echigo, S
Minear, RA
Yamada, H
Jackson, PE
机构
[1] Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA
[2] Kyoto Univ, Res Ctr Environm Qual Control, Otsu, Shiga 5200811, Japan
[3] Dionex Corp, Sunnyvale, CA 94088 USA
关键词
water analysis; disinfection by-products; derivatization; LC; environmental analysis; bromate; nitrite; inorganic anions;
D O I
10.1016/S0021-9673(01)00533-7
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Three post-column ion chromatographic methods (i.e., a sodium bromide-sodium nitrite method, an o-dianisidine method, and a potassium iodide-ammonium heptamolybdate method) were compared for bromate and nitrite analysis. Also, the effect of direct mixing of the reagents without ion suppressors for the sodium bromide-sodium nitrite method and the potassium iodide-ammonium heptamolybdate method was investigated. For the analysis of bromate, the three methods showed similar method detection limits (0.17-0.24 mug/l) with pneumatic reagent delivery systems. Direct reagent mixing achieved comparable detection limits to the suppressor configuration. The three methods are also compatible with conductivity detection. When used in combination with conductivity detection, this compatibility allows simultaneous analysis of bromate, nitrite, and other common ions in drinking water, such as bromide. It was found that the o-dianisidine method achieves mug/l-Ievel detection of nitrite and bromate with a simpler configuration than the potassium iodide-ammonium heptamolybdate method, while the sodium bromide-sodium nitrite method was not sufficiently sensitive for nitrite analysis at the mug/l level. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:205 / 211
页数:7
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