On-line monitoring of trihalomethanes in drinking water using continuous-flow purge and cryofocusing gas chromatography-mass spectrometry

被引：20

作者：

Chen, TC ^{[1
]}

Her, GR ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Chem, Taipei 10764, Taiwan

来源：

JOURNAL OF CHROMATOGRAPHY A | 2001年 / 927卷 / 1-2期

关键词：

purge-and-trap methods; cryofocusing; trihalomethanes; halogenated compounds;

D O I：

10.1016/S0021-9673(01)01072-X

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

A continuous-flow purge-and-trap-GC-MS system was developed for on-line monitoring of THMs (trihalomethanes) in drinking water. Three systems with different traps and purging flow-rates are discussed. In order to minimize interference from water vapor, total purge gas volume and injection temperature were controlled during analysis. Shorter sample concentration time and GC separation time reduced total cycle time to less than 5 min. The detection limits of the system could be lowered to 10 ppt, 25 ppt, 40 ppt, and 50 ppt (w/w) for CHCl3, CHCl2Br, CHClBr2, and CHBr3, respectively. This system could detect changes in sample concentration when applied to the on-line monitoring of THMs in drinking water. (C) 2001 Published by Elsevier Science B.V.

引用

页码：229 / 235

页数：7

共 10 条

[1] OCCURRENCE OF ORGANOHALIDES IN CHLORINATED DRINKING WATERS [J].