摘要
采用低温连续相变萃取技术分离石榴籽油,以油脂得率为指标,通过正交试验L9(3~4)优化萃取工艺,并对石榴籽油理化性质和脂肪酸组成进行分析。结果表明,低温连续相变萃取石榴籽油的最佳工艺条件为:原料颗粒度60目,萃取压力0.5 MPa,萃取温度45℃,萃取时间70 min,解析温度70℃,该条件下石榴籽油得率为15.94%,石榴籽原料含油量16.31%,提取回收率高达97.60%。低温连续相变萃取石榴籽油呈浅黄色半固体膏状物,酸价为3.26 mg KOH/g,过氧化值为0.10g/100g。石榴籽油主要脂肪酸组成为9C,11TR,13TR-十八碳三烯酸甲酯(亚油酸,68.09%)、亚油酸甲酯(9.13%)、十八烯酸甲酯(6.91%)、棕榈酸甲酯(4.73%)、硬脂酸甲酯(3.33%)。
It was mainly elaborated the in this study grease extraction from pomegranate seed by using the technology of continuous phase transition extraction at low temperature.The extraction technology was optimized through the orthogonal experiment L_9（3~4）based on the index of grease yield.Moreover,pomegranate seed oil physicochemical properties and the fatty acid composition werealso analyzed.It turned out that the best process conditions for the continuous phase transition extraction at low temperature of the pomegranate seed oil included raw material granularity containing 60 mesh,extracted under about 0.5MPa for 70 min,extracting at 45℃and parsing at 70℃.The yield of pomegranate seed oil is 15.94% under the above conditions.The content of the raw oil from pomegranate seeds was 16.31%,and its extraction recovery rate was as high as 97.6%.Pomegranate seed oil extracted through continuous phase transition at low temperature presented light yellow semisolid paste with acid value 3.26 mg KOH/g and peroxide value 0.1g/100 g.The main fatty acid compositions of pomegranate seed oil was found to be linoleic acid（68.09%）,methyl linoleate（9.13%）,oleic acid methyl ester（6.91%）,methyl palmitate（4.73%）,and methyl stearate（3.33%）.
出处
《食品与机械》
CSCD
北大核心
2017年第2期148-151,共4页
Food and Machinery
基金
广东省科技厅科技计划项目(编号:2013B051000071)
关键词
石榴籽油
低温连续相变萃取
理化性质
脂肪酸组成
pomegranate seed oil
continuous phase transition n-butane
physicochemical properties
fatty acid composition
