Title: Determination of Pyrethroids Residues in Tea with Gas Chromatography
Abstract: The article is aimed at studying the method of determining and analyzing pyrethroid pesticides in tea.The pesticide residues were extracted from tea samples by petroleum ether-acetone(V/V,3:1),and were cleaned up with the Florisil column,eluted with(V/V, 9:1),then determined with gas chromatography equipped with electron-capture detector(GC-ECD).The recoveries obtained from tea samples(n=5)added with pesticide standards at the three levels of 0.2mg/L、0.4mg/L、0.8mg/L are in the ranges of 80.7%to105.8%,with the RSDs in the ranges of 1.8%to 8.9%.The detection limits of the pyrethroids are in the range of 0.0003 to 0.0042 mg/kg.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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