Detection of virgin coconut oil adulteration with animal fats using quantitative cholesterol by GC x GC-TOF/MS analysis

文献类型： 外文期刊

第一作者： Xu, Baocheng

作者： Xu, Baocheng;Li, Peiwu;Ma, Fei;Wang, Xiuping;Chen, Ran;Yang, Qingqing;Zhang, Wen;Zhang, Qi;Li, Peiwu;Ma, Fei;Wang, Xiuping;Chen, Ran;Xu, Baocheng;Li, Peiwu;Yang, Qingqing;Zhang, Wen;Zhang, Qi;Li, Peiwu;Ma, Fei;Chen, Ran;Yang, Qingqing;Xu, Baocheng;Li, Peiwu;Ma, Fei;Wang, Xiuping;Zhang, Wen;Zhang, Qi;Matthaeus, Bertrand;Xu, Baocheng;Xu, Baocheng

作者机构：

关键词： Virgin coconut oil;Animal fats;Cholesterol;Adulteration;GC x GC-TOF/MS

期刊名称：FOOD CHEMISTRY （ 影响因子：7.514； 五年影响因子：7.516 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： A new method based on the cholesterol level was developed to detect the presence of animal fats in virgin coconut oil (VCO). In this study, the sterols in VCO and animal fats was separated using conventional one-dimensional gas chromatography (1D GC) and comprehensive two-dimensional gas chromatography (GC x GC). Compared with 1D GC, the GC x GC system could obtain a complete baseline separation of the sterol trimethylsilyl ethers derived from cholesterol and cholestanol, so that the cholesterol content in pure VCO and false VCO adulterated with animal fats could be accurately determined. Cholesterol, a main sterol found in animal fats, represented less than 5 mg/kg of VCO. The study demonstrated that the determination of the cholesterol level in VCO could be used for reliable detection of the presence of lard, chicken fat, mutton tallow, beef tallow, or their mixture in VCO at a level as little as 0.25%. (C) 2015 Elsevier Ltd. All rights reserved.

分类号： TS2`TS201.2

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