摘要
采用正交实验法确定了超声强化超临界CO2萃取(USCE)复方丁香肉桂挥发油的最优工艺参数,借助由微分质量衡算和Fick第一定律推导出的模型方程,建立了相应的萃取动力学模型,通过分析有无超声强化的动力学模型研究了超声对超临界CO2萃取(SCE)的强化效果,运用GC-MS分析和GC定量分析对比了复方丁香肉桂挥发油合提与分提的情况.结果表明:在最优工艺参数下,即萃取压力25MPa,萃取时间4.0 h,CO2流量3.0 L/h,超声功率密度60W/L,挥发油得率可达11.60%;超声能够对超临界CO2萃取起到强化作用;合提时,丁香与肉桂的综合作用使挥发油得率的复方实际值大于单方加和值.
The optimal parameters for the ultrasound-assisted supercritical CO2 extraction （USCE） of volatile oil from the compound recipe of clove and cinnamon were determined by orthogonal experiments, and the corresponding dynamic models were established based on the model equation deduced from the differential mass balance and Fick＇s first law. By analyzing the dynamic models of USCE and supercritical CO2 extraction （SCE） , the enhancement effect of ultrasonic on SCE was revealed. Moreover, by means of GC-MS and GC analyses, the yields of the volatile oil respectively with simultaneous and individual extractions were compared. The results show that, in the optimal conditions, namely an extraction pressure of 25MPa, an extraction time of 4. 0h, a CO2 flowrate of 3. 0L/h and an ultrasonic power density of 60 W/L, the yield of the volatile oil reaches 11.60% , thus revealing the enhancement of SCE by ultrasonic. It is also found that the yield of volatile oil from the compound recipe of clove and cinnamon is greater than the sum of the yields of individual extractions of clove and cinnamon.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第7期67-71,共5页
Journal of South China University of Technology(Natural Science Edition)
基金
广东省科技计划资助项目(2006B35605002)
广州市科技计划资助项目(2007Z3-E5131)
关键词
超声
超临界CO2萃取
丁香
肉桂
挥发油
合提
分提
ultrasonic
supercritical CO2 extraction
clove
cinnamon
volatile oil
simultaneous extraction
individual extraction
