Determination of 30 Prohibited Pesticide Residues in Ginseng Medicinal Materials by LC-MS/MS Direct Extraction Method
Objective:This study aims to establish an analytical method for determining 30 prohibited pesticide residues in ginseng medicinal materials using liquid chromatography with tandem mass spectrometry.Method:A direct extraction method was applied.The samples were extracted with acetonitrile,followed by homogenization,centrifugation,and final concentration to a fixed volume with acetonitrile.The results were quantified using the matrix external standard method.Results:The 30 prohibited pesticides were categorized into 5 groups according to their quantitative limits.Group A(quantitative limit:0.01mg/kg)showed a linear range of 2-25ng/ml;Group B(0.02mg/kg)showed 4-50ng/ml;Group C(0.03mg/kg)showed 6-75ng/ml;Group D(0.05mg/kg)showed 10-125ng/ml;and Group E(0.1mg/kg)showed 20-250ng/ml.All correlation coefficients exceeded 0.993.The average recovery rate ranged from 60％to 110％,with a relative standard deviation(RSD)between 1.1％and 11.2％.Conclusion:This method demonstrates high accuracy,good repeatability,and efficiency for detecting 30 pesticide residues in ginseng medicinal materials.
ginsengliquid chromatography with tandem mass spectrometryrapid extraction methodprohibited pesticide residues
万方数据
维普
