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| Determination of Organophosphorus Pesticide Residues in Chinese Wolfberry by Gas Chromatography-Triple Quadrupole Mass Spectrometry with Accelerated Solvent Extraction |
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| DOI： |
| KeyWord:accelerated solvent extraction organophosphorus pesticides solid phase extraction(SPE) gas chromatography-triple quadrupole mass spectrometry(GC-MS/MS) |
| Author | Institution |
| FENG Chun,SHI Zhi-hong,WU Xing-qiang,HU Xue-yan,FAN Chun-lin |
1.College of Chemistry and Environmental Science,Hebei University;2.Chinese Academy of Inspection and Quarantine |
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| Abstract: |
| A gas chromatography triple quadrupole mass spectrometry(GC-MS/MS) with accelerated solvent extraction was developed for the determination of 20 organophosphorus pesticides residues in Chinese wolfberry.The samples were first extracted with acidified acetonitrile-dichloromethane(4∶1,by volume),then purified on a Cleanert TPH solid phase extraction column,next concentrated by rotary evaporation and dried with nitrogen,and finally analyzed by GC-MS/MS.The experimental conditions such as extraction solvent,temperature and rinse volume were optimized.Results showed that the calibration curves for 20 pesticides were linear in the range of 1-500 μg/kg with their correlation coefficients(r2) of 0.999 0-0.999 8.The spiked recoveries at three levels of 20,40 and 100 μg/kg were in the range of 70.0%-82.9% with the relative standard deviations(RSDs,n=5) of 0.6%-8.5%.The limits of quantitation of the method ranged from 1.0 μg/kg to 15.0 μg/kg.The method is simple and accurate,and is suitable for the determination of organophosphorus pesticide residues in Chinese wolfberry. |
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