富含甾醇小米谷糠油提取工艺研究

摘要

比较了相同提取条件下正己烷与异丙醇提取小米谷糠油的得率.结果发现:异丙醇提取的小米谷糠油得率比正己烷高4.83百分点,可以达到25.32%.异丙醇在不同提取条件下提取小米谷糠的正交试验表明:当提取温度70℃,提取时间4 h,提取4次时,小米谷糠油得率最高,为25.61%;当提取温度60℃,提取时间4 h,提取3次时,小米谷糠油中甾醇含量为1.394%,油得率为24.75%.%The oil yields of millet bran extracted with hexane and isopropanol in the same conditions were compared.The results showed that the oil yield of isopropanol extraction was 25.32％, which was 4.83％ more than that of hexane.The orthogonal test showed that the highest oil yield was 25.61％ under extraction conditions of 70 ℃, 4 h and extraction 4 times; and under extraction conditions of 60 ℃, 4 h and extraction 3 times, the sterol content and the oil yield reached 1.394％ and 24.75％ ,respectively.