Determination of 16 Polycyclic Aromatic Hydrocarbons in Tea by Simultaneous Dispersive Solid-Phase Extraction and Liquid-Liquid Extraction Coupled with gas Chromatography-Tandem Mass Spectrometry

文献类型： 外文期刊

第一作者： Chen, Hongping

作者： Chen, Hongping;Gao, Guanwei;Liu, Pingxiang;Pan, Rong;Liu, Xin;Lu, Chengyin

作者机构：

关键词： Tea;Polycyclic aromatic hydrocarbons;Gas chromatography-tandem mass spectrometry;Simultaneous dispersive solid-phase extraction and liquid-liquid extraction

期刊名称：FOOD ANALYTICAL METHODS （ 影响因子：3.366； 五年影响因子：3.07 ）

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收录情况： SCI

摘要： An anti-contamination method for the simultaneous determination of 16 polycyclic aromatic hydrocarbons (PAHs) in tea was developed using gas chromatography-tandem mass spectrometry. In this study, three transitions for each PAHs were monitored at multi-reaction monitoring (MRM) mode and pseudo-MRM mode to improve the reliability of the developed method. The PAHs were extracted using acetonitrile and then cleaned up by simultaneous dispersive solid-phase extraction (D-SPE) and liquid-liquid extraction (LLE). A mixture of adsorbents that contain primary-secondary amine, octadecylsilane and florisil was applied for the D-SPE cleanup. The solvent used for LLE was n-hexane with a 1:2 (v/v) ratio of acetonitrile extracts and n-hexane. Loss of PAHs occurred during sample preparation because of incomplete extraction of PAHs from the acetonitrile extracts into n-hexane with the LLE treatment. Isotopic surrogate standards were used to calibrate for the loss of PAHs during sample preparation. For the 16 PAHs, linear calibrations with coefficients R (2) a parts per thousand yenaEuro parts per thousand 0.99 were obtained. The limits of quantifications of the 16 PAHs were < 3 mu g kg(-1). The recovery rates of samples spiked with 10, 50 and 200 mu g kg(-1) of analytes varied from 77 to 116 %, with relative standard deviations of < 13 %. The developed method was used to determine the PAHs in 46 tea samples.

分类号： TS2

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