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| Determination of Organophosphorus Amino Acids Herbicides Residues in Fruits and Vegetables by Underivatization/Liquid Chromatography－Tandem Mass Spectrometry |
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| DOI： |
| KeyWord:underivatization organophosphorus amino acids herbicides liquid chromatography－tandem mass spectrometry |
| Author | Institution |
| LIN Li-min，ZHANG Jian-ying，XIAO Feng，HUANG Ke，YE Gang，HONG Xiao-liu，L? Fei |
1. Food Inspection & Quarantine Center，Shenzhen Customs，Shenzhen ，China;
2. Comprehensive Technology Center of Huizhou Customs，Huizhou ，China |
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| Abstract: |
| An underivatization/liquid chromatography－tandem mass spectrometric method was developed for the determination of 4 organophosphorus amino acids herbicides in fruits and vegetables．Samples were firstly extracted with water－dichloromethane solution，then purified by dichloromethane liquid－liquid extraction with HLB solid phase extraction column，and finally determined by liquid chromatography－mass spectrometry．At the optimal conditions，the linear correlation coefficients（r） for all compounds were more than 0.996 in the concentration range of 0.010－0.200 mg/L．The limits of detection and quantitation of the method were 0.01 mg/kg and 0.05 mg/kg，respectively．The average recoveries for all compounds at spiked levels of 0.050，0.100 and 0.200 mg/kg ranged from 72.2% to 109%，with relative standard deviations（RSDs，n = 6） of 2.2%－11%．The method is rapid，simple，sensitive and accuracy，and it could be used for the determination and confirmation of organophosphorus amino acids herbicides in fruits and vegetables. |
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