用超临界CO_2萃取技术从穿山龙中提取薯蓣皂甙元

Supercritical CO_2 Extraction of Diosgenin from Dioscorea

采用超临界CO2流体萃取技术从穿山龙中提取薯蓣皂甙元，对提取工艺、条件进行了研究。选择穿山龙水解物粒度为40目，夹带剂为体积分数95％的乙醇，通过正交实验确定了萃取压力35MPa、萃取温度55℃、CO2流量40～45kg／h和提取时间3．0h，粗品薯蓣皂甙元的提取率为4．44％，粗品中薯蓣皂甙元的质量分数为。（薯蓣皂甙元）=54．65％。

Supercritical CO2 extraction technology is used to extract diosgenin from dioscorea. The orthogonal experiment result shows that, the granularity of hydrolyzed dioscorea is 40 mesh, the cosolvent is 95% ethanol, the extraction pressure is 35 MPa,the extraction temperature is 55 ℃, CO2 flow rate is 40 - 45 kg/h, and the extraction time is 3.0 h. Under these optimum conditions,4.44% crude diosgenin is obtained and the mass fraction of diosgenin in the crude product is 54.65%.