期刊
MICROCHEMICAL JOURNAL
卷 84, 期 1-2, 页码 63-69出版社
ELSEVIER
DOI: 10.1016/j.microc.2006.04.015
关键词
stir bar sorptive extraction; food analysis; pesticides; evaluation methods; quantitation database; retention time locking; automated deconvolution and identification system
Fruit and vegetable samples collected at a local market were analyzed using stir bar sorptive extraction (SBSE) followed by thermal desorption, retention time locked (RTL) gas chromatographic separation and full scan mass spectrometric determination. Although the technique is proven to have sufficient extraction efficiency and productivity in pesticide analysis, the full scan chromatograms are loaded with matrix components making qualitative evaluation time consuming and too difficult to be adequate for routine laboratory screening. Identification can be facilitated to a great extent with evaluation methods provided by data evaluation software. Through the comparison of three evaluation methods we found that the mass spectral deconvolution software AMDIS supports most the decision making process, performing best in discovering positive hits and reducing data for supervision, making SBSE suitable for routine applications. (c) 2006 Elsevier B.V. All rights reserved.
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