期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1300, 期 -, 页码 127-133出版社
ELSEVIER
DOI: 10.1016/j.chroma.2013.04.040
关键词
QuEChERS; Pesticide residue; Magnetic adsorbent; Gas chromatography-mass spectrometry; Vegetables
资金
- Major State Basic Research Development Program of China (973 Program) [2013CB910702, 2012CB720601]
- National Natural Science Foundation of China [91017013, 31070327, 91217309]
- Fundamental Research Funds for the Central Universities
By using magnetic graphitized carbon black and primary secondary amine (GCB/PSA/MNPs) as adsorbent, a modified quick, easy, cheap, effective, rugged and safe (QuEChERS) method was proposed for pesticide residue analysis in vegetables. The magnetic adsorbent was fabricated via simple co-mixing method based on an aggregate warp mechanism. To achieve the optimum conditions of modified QuEChERS toward target analytes, several parameters, including the composition of analyte protectants and the amount of the adsorbents were investigated. Under the optimized conditions, a simple, rapid and effective method for the determination of 10 pesticide residues in vegetables was established by coupling modified QuEChERS to gas chromatography/mass spectrometry analysis. The detection limits of the proposed method for 10 pesticides ranged from 0.39 to 8.6 ng/g. Good linearity (R value >= 0.990) was achieved at concentration levels of 10-200 ng/g, and acceptable method reproducibility was found as intra- and inter-day precisions, yielding the relative standard deviations less than 10.7% and 13.4%, respectively. The recoveries were in the range of 69.9-125.0% at different concentrations for real samples. Compared with the reported methods for the determination of a large number of samples, the proposed method has the advantage of less time-consuming in clean-up procedure. (C) 2013 Elsevier B.V. All rights reserved.
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