Gas chromatographic-mass spectrometric method for the analysis of dimethomorph fungicide in dried hops

被引:25
作者
Hengel, MJ [1 ]
Shibamoto, T [1 ]
机构
[1] Univ Calif Davis, Dept Environm Toxicol, Davis, CA 95616 USA
关键词
dimethomorph; fungicide; gas chromatography; hops; mass spectrometry;
D O I
10.1021/jf000620j
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
An analytical method for the determination of dimethomorph [(E,Z)-4-[3-(4-chlorophenyl)-3-(3,4-dimethoxyphenyl)acryloyl] morpholine] residues in dried hops was developed utilizing liquid-liquid partitioning, automated gel permeation chromatography (GPC), Florisil and aminopropyl solid phase extraction (SPE) column cleanups, and gas chromatography (GC) with mass selective detection (MSD). Method validation recoveries from dried hops ranged from 79 to 103% over four levels of fortification (0.1, 1.0, 5.0, and 20 ppm). Control and dimethomorph-treated hop samples collected from three field sites had residue levels of <0.10 and 4.06-17.32 ppm, respectively. The method was validated to the limit of quantitation at 0.10 ppm. The limit of detection for this method was 0.045 ppm.
引用
收藏
页码:5824 / 5828
页数:5
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