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Chinese Agricultural Science Bulletin ›› 2008, Vol. 24 ›› Issue (7): 81-84.

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Dissipation of Cyhalothrin in Gynostemma Pentaphyllum

Li Keming, Qin Weiquan, Li Xiulian, Li Chaoxu, Huang Shanchun   

  • Received:2008-03-20 Revised:2008-05-19 Online:2008-07-05 Published:2008-07-05

Abstract: The residual dynamics of cyhalothrin in Gynostemma Pentaphyllum were determined by gas chromatography.Gynostemma Pentaphyllum samples were extracted with acetone and petroleum ether,separated by capillary column and determined with ECD.The results showed the limit of detection was 5×10-12g and the minimum concentration of detection was 8×10-3mg/kg.The half life of cyhalothrin in Gynostemma Pentaphyllum was about 5 days. The terminal residues Gynostemma Pentaphyllum were not detected after 30 days.

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