作　　者： ; ; ;

机构地区： 华南理工大学轻工与食品学院

出　　处： 《精细化工》 2006年第3期269-272,共4页

摘　　要： 为改善超临界CO2在萃取极性物质和传质方面的缺点,用自行设计的超声强化超临界CO2萃取设备,研究了夹带剂、超声和反相微乳技术对超临界CO2萃取人参皂甙的强化效果。实验条件设定为:萃取压力、温度与时间分别为25 MPa、45℃、4 h,CO2流量为2.0 L/h,分离压力与温度分别为6 MPa和55℃,超声频率、功率密度和辐照方式分别为20 kHz、100 W/L和6 s/6 s。实验结果发现,超声联合超临界CO2反相微乳萃取的人参皂甙萃取率分别是SC、MSC、UMSC和SCRM的13.9、4.9、3.1和1.8倍,其萃取固形物中皂甙的质量分数分别是SC和MSC的4.5和2.1倍;MSC、UMSC、SCRM和USCRM的人参皂甙萃取速率大小顺序依次为:USCRM>SCRM>UMSC>MSC;超声的加入不会改变对萃取人参皂甙的选择性和人参皂甙的结构。 In order to improve the polar components extraction yield and the mass transfer of supercritical CO2 extraction,an ultrasonically enhanced supercritical fluids extraction device was made at home. The effects of modifier,ultrasound and reverse microemulsions on ginsenosides extraction with supercritical CO2 were studied. The experimental conditions were selected as follows ： extraction pressure 25 MPa,extraction temperature 45 ℃ ,extraction time 4 h,flow rate of CO2 2.0 L/h,separate pressure 6 MPa,temperature 55 ℃, ultrasonic frequency 20 kHz, ultrasonic power density 100 W/L, and the manner of ultrasonic irradiation 6 s/6 s. The results showed that the extraction yield of ginsenosides of supercritical CO2 reverse microemulsion extraction with ultrasound （USCRM） was 13.9,4.9,3.1 and 1.8 times that of SC, MSC, UMSC and SCRM, respectively. The ginsenosides mass percent of solid extracted by USCRM was 4. 5 and 2. 1 times that by SC and MSC respectively. The extraction rate order of ginsenosides from ginseng with different extraction methods was USCRM 〉 SCRM 〉 UMSC 〉 MSC. Ultrasound did not change the selectivity and structure of ginsenosides.

关 键 词： 超临界 萃取 夹带剂 超声 反相微乳 人参皂甙

领　　域： [理学] [理学]