Determination of organochlorine pesticide residues in herbs by capillary gas chromatography
نویسنده
چکیده
Objective. The capillary gas chromatographic method was introduced for determining organochlorine pesticide residues (OCPs) in traditional Chinese medicines: Gastrodia Tuber, Fructus Corni and Spica Prunellae. Methods. The organochlorine pesticides were extracted from herbs with mixed solvents (petroleum ether), cleaned up by concentrated HzSO4, and separated by capillary column with electron capture detection. Results. The method is linear ov~r the range 6 300 fLglL for four pesticides. Correlation coefficients varied between O.9963 and O.9992. Limits of detection (LaDs) ranged from 3.91 X 10-8 to 9.05 X 10-8 fLglL. The average recoveries were within 77.13% 102. 33 % and RSD was 0.94 % 2.84 %. Conclusion. This method is accurate and reliable for OCPs determination in the three herbs. [Life Science Journal. 2007;4(l):40-42J OSSN: 1097-8135).
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