Objective To determine multi-residues of organochlorines pesticides (OCPs) and pyrethroid pesticides in tea by accelerated solvent extraction-gas chromatography ( ASE-GC ) method. Method Samples were extracted with thiacyclohexane-ethyl acetate ( 1 ∶ 1,V /V) . The extracts were purified by solid-phase extraction by using florisil as a adsorbent and were detected by gas chromatography-electron capture detection ( GC-ECD) . Results The recoveries of standard addition at the levels of 0. 01,0. 05 and 0. 25 mg / kg were more than 90% ,the relative standard deviations ( RSD ) were in the range of 0. 3% -3. 8% . Conclusion The method of ASE-GC is fast, low cost and in good reproducibility,which can be used for the determination of multi-residues of organochlorine and pyrethroid pesticides in tea.
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LIU Zhong. Determination of Pesticide Residues in Tea by Accelerated Solvent Extraction-Gas Chromatography[J].中国食品卫生杂志,2010,22(6):516-518.