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《Occupation and Health》 2012-01
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Determination of 8 pyrethroid pesticide residues in tea by QuEChERS-Gas Chromatography

HUANG Cheng,GUO Mei,ZHANG Huai-yu,ZHOU Ri-dong Health laboratory,Zhongshan Center for Disease Control and Prevention,Guangdong,528403,China  
[Objective]To establish the rapid QuEChERS-Gas Chromatography(GC) method for determination of pyrethroid pesticide residues in tea. [Methods]The pyrethroid pesticide residues was extracted by 0.1% acetonitrile and acetic acid.Dispersive solid-phase extraction was performed by(N-propyl ethylenediamine filler) PSA powder,ODSC-18 and Graphitized carbon black powder.The purified solution was analyzed by GC-ECD. [Results]The recoveries of 8 pyrethroids were 78.2%-109.0%,the RSD was 1.5%-7.9%,the minimal detection concentration was 0.006-0.03 mg/kg. [Conclusion]The method is simple,rapid and convenient for simultaneous determination of 8 pyrethroids in tea. has better accuracy and recovery and is suitable for determining pyrethoid pesticides in tea.
【CateGory Index】: TS272.7;O657.71
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