狐狸油组成和理化性质研究

    Composition and Physico-chemical Properties of Fox Oil

    • 摘要: 为开发和利用狐狸油,研究分析其理化指标、组成、热力学性质和氧化稳定性。结果表明:狐狸油理化指标均符合食用动物油脂的要求;狐狸油全样和Sn-2位富含棕榈酸、油酸和亚油酸,其中狐狸油全样饱和脂肪酸和单不饱和脂肪酸含量均明显高于其在Sn-2位的,而多不饱和脂肪酸含量和总的不饱和脂肪酸含量均明显低于其在Sn-2位的;狐狸油甘油酯组成中甘三酯含量约为99.2%,而甘一酯未检出;根据DSC曲线可知,狐狸油甘三酯种类较多且具有不同的熔点范围,棕榈酸和硬脂酸甘一酯均可促进狐狸油结晶;在储存温度为20℃时狐狸油的货架期约为98 d,而当添加TBHQ时货架期可延长至约908 d。

       

      Abstract: The physicochemical properties, composition, thermal properties and oxidative stability of fox oil were investigated for its utilization.The results indicated that the physicochemical properties of fox oil were accorded with the standard of edible animal oil.The contents of palmitic, oleic and linoleic acids were the main fatty acids in total fatty acid composition and the fatty acid at Sn-2.The total contents of saturated and mono-saturated fatty acids of fox oil were both significantly higher than that of Sn-2.However, the poly-unsaturated and total unsaturated fatty acid content of fox oil were both significantly lower than those of Sn-2.The content of triacylglycerol was about 99.2%, and monoacylglycerol was not found.According to the DSC curve, fox oil had many different triacylglycerols with different melting range.The monoacylglycerols of palmitic and stearic acid could favor the crystallization of fox oil.The predicted shelf-life of fox oil at 20℃was about 98 days by Rancimat.However, the predicted shelf-life of fox oil was about 908 days if 200 mg/kg TBHQ was added.

       

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