期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1095, 期 1-2, 页码 1-7出版社
ELSEVIER
DOI: 10.1016/j.chroma.2005.07.107
关键词
stir bar sorptive extraction; solid-phase microextraction; organophosphorus pesticides; capillary gas chromatography; thermal desorption; thermionic specific detection
Organophosphorus pesticides (OPPs) in vegetables were determined by stir bar sorptive extraction (SBSE) and capillary gas chromatography with thermionic specific detection (TSD). Hydroxy-terminated polydimethylsioxane (PDMS) prepared by sol-gel method was used as extraction phase. The effects of extraction temperature, salting out, extraction time on extraction efficiency were studied. The detection limits of OPPs in water were <= 1.2 ng/l. This method was also applied to the analysis of OPPs in vegetable samples and matrix effect was studied. Linear ranges of OPPs in vegetable samples were 0.05-50 ng/g with detection limits <= 0. 15 ng/g and the repeatability of the method was less than 20% relative standard deviation. (c) 2005 Elsevier B.V. All rights reserved.
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