Citation: CUI Lili, YAN Meixia, PIAO Xiangmin, PANG Shifeng, WANG Yingping. Rapid determination of pesticide multiresidues in panax ginseng by QuEChERS-gas chromatography-mass spectrometry[J]. Chinese Journal of Chromatography, ;2018, 36(11): 1173-1180. doi: 10.3724/SP.J.1123.2018.06015 shu

Rapid determination of pesticide multiresidues in panax ginseng by QuEChERS-gas chromatography-mass spectrometry

Institute of Special Wild Economic Animals and Plants, Chinese Academy of Agricultural Sciences, Changchun 130112, China

Received Date: 20 June 2018

Fund Project: Science and Technology Innovation Project of Chinese Academy of Agricultural Sciences (No. CAAS-ASTIP-2016-ISAPS)

In this study, the extraction and purification improvements of the QuEChERS method were coupled with gas chromatography-mass spectrometry (GC-MS) to determine 20 pesticides in panax ginseng. Dry ginseng powder was mixed with water, and the solution was then extracted with acetonitrile and purified with N-propylethylenediamine (PSA) and MgSO₄ to remove co-extractives that might interfere with the results. The target compounds were detected after electron-impact ionization in selected ion monitoring (SIM) mode. Under optimum conditions, the method gave a good linear relationship for the determination of the pesticides within a certain concentration range, with correlation coefficients greater than 0.990. Moreover, the limits of detection (S/N=3) were 0.002-0.007 mg/kg, the limits of quantification (S/N=10) were 0.002-0.024 mg/kg, and the average recoveries for pesticides in panax ginseng were 70.41%-114.06%, with relative standard deviations of 0.76%-15.47%. In comparison with previous methods, the new procedure has the advantages of simple sample preparation and higher sensitivity.
- QuEChERS,
- gas chromatography-mass spectrometry (GC-MS),
- pesticides,
- panax ginseng
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