Journal
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
Volume 53, Issue 2, Pages 126-134Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/03601234.2017.1387026
Keywords
Organochlorine pesticides; pyrethroid pesticides; gas chromatography-tandem mass spectrometry; ultrasound-assisted extraction; dispersive-solid phase extraction; Chinese patent medicines
Funding
- Youth Science Fund of the State Key Laboratory of Food Science and Technology in Nanchang University [SKLF-QN-201507]
- Objective-oriented Project for the State Key Laboratory of Food Science and Technology in Nanchang University [SKLF-ZZA-201612]
- Science and Technology Program of the Education Department of Jiangxi Province [GJJ14221]
- Natural Science Foundation of China [21465017, 31560478]
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A simple, sensitive, reliable method was developed for the simultaneous determination of organochlorine and pyrethriod pesticide residues in Chinese patent medicines Six ingredient rehmannia pills and Xiaoyao pills. These pesticides were extracted by ethyl acetate. The extraction time and volume of ethyl acetate were optimized. Cleanup of extracts was performed with dispersive-solid phase extraction using graphitized carbon black as the sorbent. The determination of pesticides in the final extracts was carried out by gas chromatography-tandem mass spectrometry in multiple reaction monitoring mode (GC-MS/MS, MRM). The linearity of the calibration curves is good in matrix-matched standard and yields the coefficients of determination (R-2) 0.99 for all of the target analytes. Under optimized conditions, the average recoveries (five replicates) for most pesticides range from 75.5% to 114.6%, and RSDs are less than 10.0%. The LODs of 18 pesticides in Six ingredient rehmannia pill and Xiaoyao pills are in the range of 0.01-8.82g kg(-1). The developed method meets the requirements of pesticide residue analysis and could be effectively used for routine analysis of the organochlorine and pyrethriod pesticide residues in Six ingredient rehmannia pills and Xiaoyao pills.
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