Dispersive microextraction based on water-coated Fe3O4 followed by gas chromatography-mass spectrometry for determination of 3-monochloropropane-1,2-diol in edible oils

文献类型： 外文期刊

第一作者： Zhao, Qin

作者： Zhao, Qin;Xiao, Neng;Yu, Qiong-Wei;Yuan, Bi-Feng;Feng, Yu-Qi;Wei, Fang

作者机构：

关键词： Dispersive microextraction;Water-coated Fe3O4;3-Monochloropropane-1,2-diol;Edible oils;GC-MS

期刊名称：JOURNAL OF CHROMATOGRAPHY A （ 影响因子：4.759； 五年影响因子：4.302 ）

ISSN： 0021-9673

年卷期： 2012 年 1240 卷

页码：

收录情况： SCI

摘要： In the present work, we developed a novel dispersive microextraction technique by combining the advantages of liquid-phase microextraction (LPME) and magnetic solid-phase extraction (MSPE). In this method, trace amount of water directly absorbed on bare Fe3O4 to form water-coated Fe3O4 (W-Fe3O4) and rapid extraction can be achieved while W-Fe3O4 dispersed in the sample solution. The analyte adsorbed W-Fe3O4 can be easily collected and isolated from sample solution by application of a magnet. It was worth noting that in the proposed method water was used as extractant and Fe3O4 served as the supporter and retriever of water. The performance of the method was evaluated by extraction of 3-monochloropropane-1,2-diol (3-MCPD) from edible oils. The extracted 3-MCPD was then derived by a silylanization reagent (1-trimethylsilylimidazole) before gas chromatography-mass spectrometry (GC-MS) analysis. Several parameters that affected the extraction and derivatization efficiency were investigated. Our results showed that the limit of detection for 3-MCPD was 1.1 ng/g. The recoveries in spiked oil samples were in the range of 70.0-104.9% with the RSDs less than 5.6% (intra-day) and 6.4% (inter-day). Taken together, the simple, rapid and cost-effective method developed in current study, offers a potential application for the extraction and preconcentration of hydrophilic analytes from complex fatty samples. (C) 2012 Elsevier B.V. All rights reserved.

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