水蒸气蒸馏法提取柿叶精油的工艺研究

采用水蒸气蒸馏法对柿叶精油的提取工艺进行了研究,正交试验优选的提取工艺是每次加水8倍(w/w),浸泡1h,回流20min,水蒸气蒸馏2h,提取效果较好。对柿叶不同生长期、贮存期挥发油含量的测定结果表明:10月份柿叶精油含量最高,干品随贮存期延长,含油量逐渐由3.71%(0个月)降至2.13%(12个月)。采用水蒸气蒸馏法得到的柿叶精油为浅黄色液体,有较浓的清香味,可用于食品、饮料、烟酒等行业,是天然香料的一种原料来源。

RESEARCH ON EXTRACTION OF ESSENTIAL OIL FROM DIOSPYROS L.LEAVES BY STEAM DISTILLATION

This paper studies the extraction of essential oil from Diospyros L.leaves by steam distillation.The optimum extraction technological conditions according to orthogonal tests are as follows:adding 8 times water(w/w) ,dipping for 1.0 h,stirring for 20 min,then steam distilling for 2 h.Different growing and storing periods showed different yields and the highest yield occured on October and decreased from 3.71%(0 month) to 2.13%(12 months) during (storing).The essential oil extracted by steam distillation is light yellow liquid with faint scent of Diospyros L.leaves,which would be a good spice for perfume in food,tobacco,drink,ect.and would be a new resource of natural fragrance and flavor.