冷榨胡麻油在加速氧化过程中品质变化的研究  

Quality Change of Cold-Pressed Flaxseed Oil During Accelerated Oxidation

作　　者：孙雪莲 张波 魏长庆[1] 刘文玉[1] 罗鹏[1] 万银松[1] Sun Xuelian;Zhang Bo;Wei Changqing;Liu Wenyu;Luo Peng;Wan Yinsong(School of Food Science and Technology,Key Laboratory of Xinjiang Phytomedicine Resource and Utilization of Ministry of Education,Shihezi University,Shihezi 832000;Walnut Research Institution,Longnan Economic Forest Research Institute,Longnan 746000)

机构地区：[1]石河子大学食品学院,新疆植物药资源利用教育部重点实验室,石河子832000 [2]陇南市经济林研究院核桃研究所,陇南746000

出　　处：《中国粮油学报》2022年第7期115-121,共7页Journal of the Chinese Cereals and Oils Association

基　　金：国家自然科学基金项目(地区科学基金项目)(31760434、31360389)。

摘　　要：以冷压榨法提取的胡麻油为研究对象,通过Schaal烘箱法加速氧化试验,分析冷榨胡麻油的理化性质、脂肪酸组成及含量、生育酚与甾醇的组成及含量、角鲨烯含量。结果表明:冷榨胡麻油在加速氧化的前20 d内,过氧化值(5.85 mmol/kg)和酸价(1.6 mgKOH/g)均符合GB 2716—2018标准;而α-亚麻酸和生育酚的含量则显著下降(P<0.05),分别减少了16.28%和79.65%,其中α-生育酚的含量在加热8 d后则无法检出。为综合评价冷榨胡麻油的品质变化规律,采用主成分分析法可将其氧化过程可分为3个阶段:第1阶段(0~8 d),第2阶段(12~20 d),第3阶段(24~28 d)。由此可知,冷榨胡麻油在加速氧化20 d内具有良好的氧化稳定性,但从有益伴随物的角度分析其在氧化8 d内适合贮藏。此研究结果可以用于预测冷榨胡麻油的货架期,为冷榨胡麻油的储藏提供数据支持。Flaxseed oil was extracted from Flaxseeds by cold-pressing method.At the same time,the physicochemical properties,fatty acid composition and content,content and composition of tocopherol and sterol,squalene content were determined by Schaal oven accelerated test.The results indicated that the peroxide value(5.85 mmol/kg)and acid value(1.55 mgKOH/g)of cold-pressed Flaxseed oil within 20 days of accelerated oxidation did not exceed the standards of GB 2716—2018.The content ofα-linolenic acid and tocopherol decreased significantly(P<0.05)by 16.28%and 79.65%,respectively.Andα-tocopherol cannot be detected after 8 days.In order to comprehensively evaluate the quality change of cold-pressed Flaxseed oil,the oxidation process can be divided into three stages by using principal component analysis:the first stage(0~8 days),the second stage(12~20 days)and the third stage(24~28 days).It could be concluded that cold-pressed Flaxseed oil hada good oxidation stability within 20 days of accelerated oxidation,but it was suitable for storage within 8 days(equivalent to 8 months at room temperature)from the perspective of beneficial accompaniment.The results of the present study could be used to predict the shelf life of cold-pressed Flaxseed oil and provide data support for the storage of cold-pressed Flaxseed oil.

关 键 词：冷榨胡麻油 Schaal烘箱法 加速氧化 氧化稳定性 

分 类 号：TS225.1[轻工技术与工程—粮食、油脂及植物蛋白工程]