Effect of Dehulling Treatment on the Oxidative Stability of Cold-Pressed Low Erucic Acid Rapeseed Oil

文献类型： 外文期刊

第一作者： Yang, Mei

作者： Yang, Mei;Liu, Changsheng;Huang, Fenghong;Zheng, Chang;Zhou, Qi

作者机构：

关键词： Oxidative stability;Food and feed science;Nutrition and health

期刊名称：JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY （ 影响因子：1.849； 五年影响因子：2.299 ）

ISSN： 0003-021X

年卷期： 2011 年 88 卷 10 期

页码：

收录情况： SCI

摘要： This study compared the oxidative stability of cold-pressed rapeseed oil (CPRO) and dehulled cold-pressed rapeseed oil (DCPRO) in the dark at 60 A degrees C and monitored the evolution of minor constituents (tocopherols, phytosterols, phenolics). The results showed that dehulling significantly influenced the oxidative stability of the oils, the DCPRO was more easily oxidized. During the autoxidation, the peroxide value (PV) and anisidine value (p-AV) of the DCPRO ranged from 2.38 to 95.97 mequiv O-2 kg(-1) and from 1.20 to 30.75, whereas those of the CPRO ranged from 3.80 to 46.17 mequiv O-2 kg(-1)and from 2.69 to 14.87, respectively. Dehulling affected the contents and the rates of decrease of tocopherols and phytosterols of the cold-pressed oils, and the rates of decrease of tocopherols and phytosterols of the CPRO were lower than those of the DCPRO (10% less, on average). The rancimat induction periods (IPs) were positively correlated with the concentrations of the total tocopherols (For DCPRO, R (2) = 0.9622, For CPRO, R (2) = 0.8334). The total phenolics contents as determined by spectrophotometry first increased and then decreased. Tocopherols and phytosterols had a greater effect on oxidative stability of the rapeseed oils during the first 30 days, and phenolics had a greater effect in the 30-40 day period.

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