Analytical Method for Determination of 41 Organophosphorus Pesticide Retention in Ginseng / 中国中医药信息杂志

ABSTRACT

Objective To establish a gas chromatographic method for the determination of 41 organophosphorus pesticide retention in ginseng. Methods Samples were extracted with acetonitril, purified by PSA solid phase extraction column, eluted by acetone-normal hexane, detected by FPD, and separated by ZB-1701 capillary column. Temperature for the samples was increased through program and the samples were determined by gas chromatography. Results 41 organophosphorus pesticides showed good linear relation in the range of 5-1000 μg/kg, and correlation coefficient was 0.991-0.998. The average recoveries at the three fortification levels (50, 100, 500μg/kg) were between 69.8% and 99.7% with the RSD between 1.9% and 15.3%. The limits of quantification (LOQ) of the 41 pesticides were between 9μg/kg and 45μg/kg. Conclusion The method developed in this study is with high degree of accuracy, good sensitivity, easy and simple to handle.