Rapid Determination of Pesticide Residues in Fresh Sweet Corn.

[Objective] This study aimed to detect all organophosphate, organochlorine and pyrethroid pesticide residues in fresh sweet corn in one determination using a gas chromatograph. [Method] The pesticide residues in fresh sweet corn were extracted and loaded to simultaneously the gas chromatograph Agilent 6890N which was equipped with two autosamplers, two columns and two detectors. [Result] All the 26 pesticides were completely separated and eluted out within 25 min. The recoveries of standard addition of the 26 pesticides ranged from 76% to 106%, with relative standard deviations (RSD) ranging from 0.5% to 8.9%. The linear regression equation fit well from 0.050 to 1.500 mg/L corn extract (F>0.996). [Conclusion] The method is accuracy, which meets the requirements of pesticide residue analysis and can be used for the rapid detection, qualitative and quantitative analysis of pesticide residues in fresh sweet corn. [ABSTRACT FROM AUTHOR]