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《Chinese Journal of Public Health Engineering》 2017-03
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Rapid determination of pesticide residues in vegetables by solid phase extraction and GC-MS

ZHANG Li;Department of Laboratory,Zhumadian Center for Disease and Prevention;  
Objective To establish a method for simultaneous determination of 29 kinds of pesticide residues in vegetables. Methods Extracted by using acetonitrile,the samples were cleaned by Carb/NH2 solid phase extraction( SPE) and volumed with acetone. 29 kinds of pesticide residues in vegetables were separated with HP-5MS capillary column with temperature programming. The qualitative and quantitative analysis were achieved by monitoring the characteristic ions of the target compounds with selected ion monitoring mode( SIM). Extraction conditions,solid phase extraction mode,selection of rinse solvent,separation conditions and mass spectrum acquisition were all discussed systematically,and actual samples were analyzed. Results The spiked recoveries about 29 kinds of pesticide residues were in the range of 72. 7%-106. 60%,the relative standard deviation( RSD) was 4. 4%-11. 6%,the detection limit( LOD) ranged from 0. 001 to0. 020 mg/kg,the limit of quantitation( LOQ) ranged from 0. 003 to 0. 060 mg/kg. Conclusion This method effectively eliminates interference in pigments and other complex matrices. To achieve a simultaneous analysis of multi-component injection,accuracy and sensitivity,and can meet the simultaneous determination of multi-component pesticide residues in vegetables.
【CateGory Index】: O657.63;TS255.7
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