期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2015
卷号：4
期号：2
页码：8
DOI：10.15680/IJIRSET.2015.0402002
出版社：S&S Publications
摘要：The effect of light and oxygen on the traditional argan oil stability was studied for a period of 12 months.The samples were stored in transparent glass vials at room temperature in the presence of air, nitrogen or in thedarkness. The autoxidation was evaluated by monitoring four parameters: tocopherols, unsaturated fatty acids (oleicand linoleic acids), conjugated dienes and peroxide value. The results obtained showed that the oil deteriorated morerapidly in the presence of light compared to the dark. This degradation was more pronounced in the presence of aircompared to the nitrogen. Indeed, the results indicated that the time before the maximum level of hydroperoxides,resulting from the degradation of unsaturated fatty acids, was to about 200 days. This period corresponded to theoxidative stability of the oil that was highly depending on the presence of the antioxidants such as tocopherols. Thus,the loss of these molecules led to accelerating unsaturated fatty acids degradation and producing conjugated dienes andhydroperoxides which are the primary products of oxidation. Since the α-tocopherol was destroyed during the first daysof storage, these are the γ- and δ-tocopherols which expressed most significant and longer antioxidant effect. The use ofnitrogen as storage environment permitted slightly delaying tocopherols deterioration and therefore unsaturated fattyacids oxidation.
