摘要
进行了微波辅助提取柚皮精油的实验。结果表明,石油醚是微波辅助提取柚皮精油的最佳溶剂,液料质量比、物料含水率、粒度、微波功率等因素对微波辅助提取柚皮精油有较大影响。通过实验得到了柚皮精油提取的最佳工艺条件:物料粒度60目,物料含水率7.4%,总液料质量比14∶1,微波功率300W,提取两次,每次微波辐射时间3min。提取液进行真空浓缩至不再有溶剂蒸出,得精油粗产品。往精油粗产品中加入乙醇溶解,放入-15℃冰箱中冷冻48h,离心分离去除树脂状物质,过滤,滤液进行真空浓缩后,即得精油,产率约2.09%,精油纯度99.0%。与传统的直接加热提取法相比,微波辅助提取法所用时间仅为直接加热提取法的1/20。
Microwave-assisted extraction（MAE） was used to extract essential oil （EO） from pomelo （Citrus grandis （L.）Osbeck） peel （CGP）. Results show that petroleum ether is an optimal solvent and the extraction was ＂affected mainly by stock mass ratio, microwave power, water content and granularity of material. The optimal conditions were obtained. Materials with granularity of 60 mesh and water content of around 7.4 % are suitable for extraction. Total solvent-material mass ratio is 14 ： 1. Extraction had to be performed twice with microwave irradiation （300 W） for 3 min each time. Crude EO was obtained after the extracted liquor was concentrated under vacuum. Crude EO was then dissolved with ethanol, frozen at - 15℃ for 48 h, and centrifugally separated and filtered to get rid of impurities. The final product EO with yield of 2.09 % and purity of 99.0 % was then obtained after distilling the liquor under vacuum. Compared with direct-heating extraction （DHE）, MAE reduced the extracting time up to 1/20.
出处
《林产化学与工业》
EI
CAS
CSCD
2005年第4期67-70,共4页
Chemistry and Industry of Forest Products
基金
广东省佛山市产学研专项资金资助项目(2003A336)
关键词
微波辅助提取
精油
沙田柚皮
microwave-assisted extraction
essential oil
Citrus grandis （ L. ） Osbeck peels
