GAS-CHROMATOGRAPHIC DETERMINATION OF CHLOROTHALONIL AND ITS METABOLITE 4-HYDROXY-2,5,6-TRICHLOROISOPHTALONITRILE (HTI) IN WATER

被引：15

作者：

VANDOORN, C ^{[1
]}

VINK, M ^{[1
]}

VANDERPOLL, JM ^{[1
]}

机构：

[1] TNO,DEPT ANAL,3700 AJ ZEIST,NETHERLANDS

来源：

CHROMATOGRAPHIA | 1995年 / 40卷 / 7-8期

关键词：

CHROMATOGRAPHY MASS SPECTROMETRY; RESIDUE ANALYSIS; CHLOROTHALONIL; 4-HYDROXY-2,5,6-TRICHLOROISOPHTALONITRILE (HTI); WATER ANALYSIS;

D O I：

10.1007/BF02269913

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

A gas chromatographic method, with electron capture detection and mass spectrometric confirmation, is described for the determination of chlorothalonil and its metabolite 4-hydroxy-2,5,6-trichloroisophtalonitrile (HTI) in water samples. Water is saturated with sodium chloride and acidified to pH < 2 with dilute sulfuric acid. After extraction with dichloromethane, HTI was methylated with diazomethane. The extract obtained was cleaned with basic alumina. Chlorothalonil and the methylated HTI-derivative were determined by gas chromatography with electron capture detection (GC-ECD) and confirmed by gas chromatography-mass spectrometry (GC-MS). The limit of detection, depending on the nature of the water samples is for both compounds between 0.01-0.03 mu g l(-1) water. The average recovery in ground water is 87% for chlorothalonil and 82% for HTI.

引用

页码：458 / 462

页数：5

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