摘要
以米渣为原料,研究利用石油醚提取米渣残油的工艺条件,通过单因素实验和正交实验,探讨了提取温度、料液比、提取时间对米渣残油提取率的影响,并对制备的油脂进行了脂肪酸组成分析。结果表明,最佳工艺条件为:温度20℃,料液比为1∶7,浸出时间2h,在此条件下,米渣残油的提取率为8.85%;米渣残油主要由8种脂肪酸组成,其中饱和脂肪酸含量25.5%,不饱和脂肪酸为73%,米渣残油中油酸与亚油酸的比例为1∶1.04,符合国际卫生组织推荐的油酸和亚油酸比例为1∶1的最佳比例。
The optimal conditions for extracting oil from rice residue were investigated using ligarine solvent.The effects of extraction temperature, ratio of material to solvent, extraction time on the oil extraction yield were discussed through single factor and orthogonal experiments, and fatty acids in the rice residue oil were analyzed by GC.The results showed that the optimal conditions were as follows, extraction temperature at 20℃, ratio of residue weight to solvent volume by 1：7, extraction time for 2h.Under these conditions, the oil extraction yield could reach to 8.85%; The oil was mainly composed of eight fatty acids, in which saturated fatty acids content were 25.5%,and unsaturated fatty acids 73%.The percentage of oleic acid and linoleic acid was 1：1.04, accorded with the optimum proportion 1：1 that WHO recommends.
出处
《食品工业科技》
CAS
CSCD
北大核心
2009年第10期217-219,共3页
Science and Technology of Food Industry
基金
教育部长江学者和创新团队发展计划(IRT0540)
食品科学与技术国家重点实验室自由探索资助课题(SKLF-TS-200818)
食品科学与技术国家重点实验室目标导向资助项目(SKLF-MB-200809)
2008年江西省高新产业重大项目
关键词
米渣
残油
提取
脂肪酸组成
rice residue
residue oil
extraction
fatty acid composition
