麻栎叶β-胡萝卜素提取工艺研究

Studies on extraction process of β-carotene in leaves of quercus acutissima

研究了麻栎叶β-胡萝卜素的提取工艺。麻栎叶的最适干燥温度为80℃，宜避光保存，可选用体积比为6：4的石油醚乙醇混合溶液为浸提剂；原料粒度、料液比、浸提时间对提取存在极显著的影响，影响大小次序为粒度〉料液比〉浸提时间；在最佳提取工艺条件下，即原料粒度为80～60目、料液比为1：50（m：V）、浸提温度为55℃、浸提时间为1．5h，浸提2次，可以达到很好的浸提效果，β-胡萝卜素抽出率为93．3％．

The extraction process of β-carotene in leaves of Quercus acutissima was investigated, The Quercus acutissima leaves should be dryed at 80 ℃, the leaves powder of Quereus acutissima be conserved at clark place, and the mixture solution of petroleum ether and 95% ethylaleohol （6 ： 4,V/V） may be used as extraetant. The optimum extracting conditions of β-carotene in Quercus aeutissima leaves were investigated. The results showed that 80 - 60 mesh leaves powder, extractant volume （mL） ：dryed Quercus aeutissima leaves weight （g） is 50 ： 1, 25 - 55 ℃, 1.5 h, extraction for 2 times were optimal. The average recovery of β-carotene was 93.3%.