新疆打瓜籽油中亚油酸的尿素包合纯化工艺研究  

Purification of linoleic acid in Xinjiang seeding-watermelon seed oil by urea adduction

作　　者：胡力 王芳梅 王伟[2] 艾合买提江[1] 王亮[1] HU Li;WANG Fangmei;WANG Wei;Ahmtijiang;WANG Liang(College of Life Science and Technology,Xinjiang University,Urumqi 830046,China;Jiangsu Product Testing and Inspection Institute,Nanjing 210007,China)

机构地区：[1]新疆大学生命科学与技术学院,乌鲁木齐830046 [2]江苏省产品质量监督检验研究院,南京210007

出　　处：《中国油脂》2020年第9期62-66,共5页China Oils and Fats

摘　　要：采用尿素包合法纯化新疆打瓜籽油中的亚油酸,以产物的碘值和得率为评价指标,在单因素试验的基础上,对纯化工艺进行Box-Behnken响应面试验优化。结果表明,最优的纯化工艺条件为包合时间13 h、包合温度4℃、95%乙醇与尿素体积质量比4∶1、尿素与混合脂肪酸质量比3∶1,在最优工艺条件下产物的碘值(I)为146.14 g/100 g,得率为46.55%。采用气相色谱对产物进行脂肪酸组成分析发现,经过尿素包合后,绝大多数的饱和脂肪酸被除去,亚油酸含量明显升高,由原来的72.910%上升到97.249%。The linoleic acid in Xinjiang seeding-watermelon seed oil was purified by urea adduction.With the iodine value and yield of the product as evaluation indexes,the Box-Behnken response surface methodology was used to optimize the process on the basis of single factor experiment,and the optimal purification conditions were obtained as follows:adduction time 13 h,adduction temperature 4℃,ratio of volume of ethanol to mass of urea 4∶1,and mass ratio of urea to mixed fatty acids 3∶1.Under the optimal conditions,the iodine value of the product was 146.14 gI/100 g and the yield was 46.55%.The fatty acid composition of the product was analyzed by gas chromatography,and it was found that most of the saturated fatty acids had been removed after urea adduction and the content of linoleic acid increased significantly from 72.910%to 97.249%.

关 键 词：打瓜籽油 亚油酸 尿素包合 气相色谱 

分 类 号：TS225.1[轻工技术与工程—粮食、油脂及植物蛋白工程] TQ645.6[轻工技术与工程—食品科学与工程]