CO_2超临界萃取桂皮精油工艺条件的优化  

Response surface methodology as an approach to optimization of ethereal oil from cassia by supercritical CO_2 extraction

作　　者：刘成国[1,2] 王冬冬[1] 陈瑶[1] 罗扬[1] 

机构地区：[1]湖南农业大学食品科技学院,湖南长沙410128 [2]食品科学与生物技术湖南省重点实验室,湖南长沙410128

出　　处：《食品与机械》2011年第2期41-43,73,共4页Food and Machinery

摘　　要：以桂皮为原料,利用CO2超临界萃取法提取桂皮精油。在单因素试验的基础上,以二苯代苦味酰基自由基清除率(2,2-Diphenyl-1-Picryhydrazyl,DPPH.)为抗氧化性指标,利用Box-Benhnken中心组合试验和响应面分析法,确定提取桂皮精油的最适工艺条件:萃取压力33.5 MPa,萃取时间1.7 h,萃取温度60.5℃。该条件下测得桂皮精油的DPPH.清除率为84.98%,预测值为85.17%。Cassia was used as raw material to extract ethereal oil using supercritical CO2 extraction.Scavenging effect of DPPH·（2,2-Diphenyl-1-Picryhydrazyl）was used as antioxidant activity index,based on single factor experiments,the optimal extraction process was determined using central composite design combined with response surface methodology.Optimal conditions of supercritical CO2 extraction of ethereal oil from cassia can be concluded as follows： Extraction pressure 33.5 MPa,extraction time 1.7 h,extraction temperature 60.5 ℃.On these conditions,the observed and predicted values of the scavenging effect of DPPH· were 84.98% and 85.17%.

关 键 词：桂皮 精油 响应面分析 CO2超临界萃取 抗氧化性 

分 类 号：TS225.19[轻工技术与工程—粮食、油脂及植物蛋白工程]