Rapid Determination Method for 12 Pyrethroid Pesticide Residues in Tea by Stir Bar Sorptive Extraction-Thermal Desorption-Gas Chromatography

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• 作者：Bin Li ; Fangang Zeng ; Qichun Dong ; Yang Cao ; Haitao Fan ; Chuanfeng Deng
• 关键词：Pyrethroid pesticide ; tea ; stir bar sorptive extraction(SBSE) ; thermal desorption ; GC-ECD
• 刊名：Physics Procedia
• 出版年：2012
• 出版时间：2012
• 年：2012
• 卷：25
• 期：Complete
• 页码：1776-1780
• 全文大小：211 K

文摘

The 12 pyrethroid Pesticides residues in tea samples can be rapidly extracted and separated by a noval stir bar sorptive extraction(SBSE)-thermal desorption(TDU)-gas chromatography(GC) method. Impurities and pyrethroid pesticides residues of tea can be seperated by this method.and then use TDU-GC to analyse pyrethroid Pesticides residues. The residues of 12 pyrethroid pesticides at same time can be identified and quantified simultaneously by SBSE-TDU-GC rapidiy with high sensitivity and good reproducibility. This method is simple, rapid, and the average adding standard recovery ratios were 92.89 % -105.01 % .The correlation coefficient of pyrethroid pesticides in tea samples is >0.9926. Good repeatability(n=6) was obtained in all the cases with The relative standard deviation lower 9.7 % .Pyrethroid pesticides residues in 4 real tea samples can be determined rapidly by this method, their pyrethroid pesticide residues are all less than MRL of China and European union.