Improved QuEChERS liquid chromatography-mass spectrometry for the determination of 23 pesticide residues in Polygonatum sibiricum
A QuEChERS rapid sample processing combined with liquid chromatography-tandem mass spectrometry detection method was established for 23 pesticide residues in Polygonatum sibiricum,including omethoate,carbendazim,and thiamethoxam.Purification and mass spectrometry conditions were optimized.The sample was extracted with 1％acetonitrile acetate and purified with 900 mg anhydrous magnesium sulfate,300 mg N-propylethylenediamine,300 mg octadecylsilane bonded silica gel,and 100 mg silica gel.The results showed that the recovery rates of 23 pesticide residues were all between 75.61％and 114.52％,with a good linear relationship.The correlation coefficient was between 0.995 5 and 0.999 9,and the relative standard deviation was less than 9.99％.The lower limit of determination was not exceed the quantitative limit specified in the Pharmacopoeia of the People′s Republic of China(2020 version).
Polygonatum sibiricumQuEChERSliquid chromatography-tandem mass spectrometry
万方数据
维普
