Simultaneous Determination of 40 Pesticides Residue in Bamboo Shoots by GC-MS Method with Solid Phase Extraction

KeyWord:solid phase extraction  bamboo shoot  pesticide residue  GC-MS

Abstract:

      A multiresidue analytical method was developed for the simultaneous determination of 40 pesticide residues in bamboo shoots based on solid phase extraction£¨SPE) coupled with gas chromatography-mass spectrometry£¨GC-MS).The pesticide residues in bamboo shoots were extracted with acetonitrile by homogenate extraction technology,concentrated after salting out.The extract was cleaned up on a solid phase extraction column with 500 mg primary secondary amine£¨PSA),eluted with acetone.The eluate was evaporated to near dryness and redissolved with n hexane.The analytes were confirmed and determined by GC-MS under selected ion monitoring mode.The results showed that the calibration curves of 40 pesticide residues were linear in the certain concentration range with correlation coefficients of 0ª±994 6-0ª±999 8.The average recoveries at three spiked levels were in the range of 68%-119% with relative standard deviations£¨RSDs) of 1ª±1%-20ª±0%.The limits of quantitation£¨LOQs, S/N=10)of 40 residues were in the range of 0ª±01-0ª±05 mg/kg.The proposed method was sensitive and reliable for the determination of 40 pesticide residues in bamboo shoots.