期刊
FOOD CHEMISTRY
卷 277, 期 -, 页码 298-306出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2018.10.128
关键词
Pesticides; Enantiomeric composition; Fruits and vegetables; Graphene
资金
- National Natural Science Foundation of China [81503029]
- Young and Middle-aged Backbone Personnel Training Program of Shenyang Pharmaceutical University [ZQN2016011]
This paper presents a novel multi-residue method for the enantioselective analysis of 22 chiral pesticides in cucumber, tomato, cabbage, grape, mulberry, apple and pear at enantiomeric levels. Pesticides were efficiently extracted by magnetic solid-phase extraction based on graphene as sorbent. Response surface methodology was used to assist the multivariable optimization. The perfect chiral separation of the enantiomers was achieved on a Chiralpak IG column within 47 min by reversed-phase liquid chromatography coupled with tandem mass spectrometry, which is a significant improvement to resolve a large group of chiral compounds under one set of conditions. The method was validated in terms of selectivity, linearity, sensitivity, trueness and precision, which all satisfy the requirement for pesticides residue analysis. The proposed method was successfully applied for monitoring the occurrence and enantiomeric composition of pesticides in different fruits and vegetables, demonstrating its applicability for the routine analysis of chiral pesticide residues in food samples.
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