南瓜籽油亚临界流体萃取工艺及成分研究  

Subcritical fluid extraction of pumpkin seed oil and its composition

作　　者：张海龙[1] 申明杰 张维[1] 朱可霞 刘雨[1] 徐君飞[1] 

机构地区：[1]怀化学院生物与食品工程学院,民族药用植物资源研究与利用湖南省重点实验室,湖南怀化418008

出　　处：《中国油脂》2016年第11期17-20,共4页China Oils and Fats

基　　金：怀化学院2015年民族药用植物资源研究与利用湖南省重点实验室开放课题项目(YYZW2015-4)

摘　　要：采用亚临界流体技术萃取南瓜籽油,在单因素试验基础上通过正交试验对工艺条件进行优化,并对此法所得南瓜籽油的脂肪酸组成及理化性质进行分析。结果表明:最优萃取工艺条件为萃取次数4次、料液比1∶5、萃取温度30℃、萃取时间25 min,在此条件下得到南瓜籽提油率为89.12%;所得南瓜籽油共检测出5种脂肪酸,主要为棕榈酸(18.84%)、亚油酸(40.17%)、油酸(29.38%)、硬脂酸(10.67%)和花生酸(0.93%);其理化指标为碘值(I)124.5 g/100 g、酸值(KOH)1.6 mg/g、皂化值(KOH)188.5 mg/g、相对密度0.915。The oil was extracted from pumpkin seed by subcritical fluid extraction, the extraction condi- tions were optimized by orthogonal experiment based on single factor experiment, and the fatty acid com- position and physicochemical properties of pumpkin seed oil were analyzed. The results showed that the optimal extraction conditions were obtained as follows： extraction times 4, ratio of solid to liquid 1： 5, ex- traction temperature 30 ℃ and extraction time 25 min. Under the optimal conditions, the oil extraction rate of pumpkin seed was up to 89. 12%. Five kinds of fatty acids were identified from the extracted pumpkin seed oil, and they were palmitic acid （18. 84%）, linoleic acid （40. 17%）, oleic acid （29.38%）, stearic acid （ 10.67% ） and arachidic acid（0.93% ） ,and the iodine value, acid value, sa- ponification value and relative density of pumpkin seed oil were 124.5 gI/100 g, 1.6 mgKOH/g, 188.5 mgKOI-I/g and 0.915, respectively. Key words：

关 键 词：南瓜籽油 亚临界流体萃取 脂肪酸组成 理化性质 

分 类 号：TS225.1[轻工技术与工程—粮食、油脂及植物蛋白工程]