Determination of 263 Pesticide Residues in Livestock and Poultry Meat by QuEChERS-LC-MS/MS
A rapid method for the determination of 263 pesticide residues in livestock and poultry meat by liquid chromatography-tandem mass spectrometry(LC-MS/MS)was developed.In the experiment,the sample was extracted with acetonitrile and QuEChERS extraction salt bag(1.5 g sodium acetate+6 g anhydrous magnesium sulfate),then purified with QuEChERS purification bag(900 mg anhydrous magnesium sulfate,150 mg N-propylethylenediamine,150 mg octadecylsilane),determined by ultra performance liquid chromatography-tandem mass spectrometry,and quantified by matrix standard curve.The results showed that the calibration curves of 263 pesticides were linear in the range of 5～200 μg·L-1,and the correlation coefficients were all above 0.99.The lower limit of quantification for the method is 0.010 mg·kg-1,the average recoveries were in the range of 60.6%～119.1%,and the relative standard deviations were less than 15%(n=6).The method is simple in pretreatment,high in accuracy and sensitivity,suitable for rapid screening and quantitative detection of pesticide residues in animal-derived foods,and suitable for routine detection.
liquid chromatography-tandem mass spectrometry(LC-MS/MS)QuEChERSpesticide residues
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