期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1406, 期 -, 页码 1-9出版社
ELSEVIER
DOI: 10.1016/j.chroma.2015.05.066
关键词
Magnetic graphene; QuEChERS; Pesticide residues; Tobacc; On-line gel permeation chromatography-gas chromatography/tandem mass spectrometry (on-line GPC-GC-MS2)
资金
- National Natural Science Foundation of China (NSFC) [21407034]
- Special Scientific Research Fund of Public Welfare Quality Inspection of China [201310134]
- Science Innovation Foundation of China National Tobacco Quality and Supervision Test Center [512014CA0110]
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences [KF2013-16]
In this study, magnetic graphene was used as modified quick, easy, cheap, effective, rugged and safe (QuEChERS) adsorbent for the determination of organochlorine pesticide (OCPs) residues in tobacco. To achieve the optimum conditions of modified QuEChERS procedure toward target analytes, several parameters affecting the clean-up efficiency including the amount of the adsorbent and clean-up time were investigated. Under the optimized conditions, a method for the determination of 26 OCPs residues in tobacco was established by coupling the modified QuEChERS procedure to on-line gel permeation chromatography-gas chromatography-tandem mass spectrometry (on-line GPC-GC-MS2). The limits of detection of proposed method for 26 OCPs residues ranged from 0.01275 to 3.150 ng/g. And good linearities of the proposed method were obtained with coefficients of determination (R-2) greater than 0.9985 for all target analytes. Good reproducibility of method was obtained as intra- and inter-day precisions, the relative standard deviations were less than 11.1 and 15.0%, respectively. The apparent recoveries were in the range of 64-126% at different concentrations for real samples. Compared with the reported methods for the determination of OCPs residues in tobacco, the proposed method has the advantages of simple to operate, low cost and high clean-up ability. Finally, the method was successfully applied to the analysis of OCPs residues in real samples. (C) 2015 Elsevier B.V. All rights reserved.
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