Metal ions accelerated phytosterol thermal degradation on Ring A & Ring B of steroid nucleus in oils

文献类型： 外文期刊

第一作者： Hu, Yinzhou

作者： Hu, Yinzhou;Li, Maiquan;Wang, Mengmeng;Zhao, Yajing;Xu, Tao;Zhang, Liuquan;Lu, Baiyi;Hu, Yinzhou;Li, Maiquan;Wang, Mengmeng;Zhao, Yajing;Xu, Tao;Zhang, Liuquan;Lu, Baiyi;Huang, Weisu;He, Yan

作者机构：

关键词： Phytosterols;Phytosterol degradation;Oil;Heating;Metal ions

期刊名称：FOOD RESEARCH INTERNATIONAL （ 影响因子：6.475； 五年影响因子：6.508 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： This study aimed to investigate the effect of metal ions on the degradation of phytosterols in oils. The oil was heated at 180 degrees C for 1 h with/without addition of Fe3+, Fe2+, Cu2+, Mn2+, Zn2+, Na+, Al3+ and Mg2+. Variations of beta-sitosterol, stigmasterol, campesterol, brassicasterol and their degradation products were confirmed by the GC-MS analysis. In general, the increase of the metal ion concentration resulted in more phytosterol degradation, and the ability of metal ions following decreasing order: Fe3+ > Fe2+ > Mn2+ >= Cu2+ >= Zn2+ > Na+ >= Mg2+ > Al3+. Metal ions significantly induced phytosterol autoxidation on C5, C6 and C7 on Ring B of steroid nucleus at even a low concentration, and induced dehydration on the C3 hydroxyl to form dienes and trienes at high concentration. The metal ions in oils are accounted for increasing phytosterol degradation, which decreases food nutritional quality and gives rise to the formation of undesirable compounds.

分类号： TS2

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