超临界CO_2萃取北方地区早园竹叶中总黄酮的工艺优化  

Process Optimization for Supercritical Carbon Dioxide Extraction of Total Flavonoids from Praecox Leaves in Northern Areas

作　　者：张珊珊[1] 朱文娴[1] 赵晓红[2] 刘绍鹏[3] 

机构地区：[1]徐州空军学院,江苏徐州221000 [2]北京联合大学应用文理学院,北京100083 [3]中国矿业大学煤炭加工与高效洁净利用教育部重点实验室,江苏徐州221008

出　　处：《食品科学》2011年第6期143-147,共5页Food Science

摘　　要：研究超临界CO2流体萃取法提取北方地区早园竹叶中黄酮的工艺。通过单因素试验确定影响总黄酮得率的主要因素及其最佳水平范围,并通过正交试验确定最佳萃取条件。结果表明:萃取温度36℃、乙醇体积分数50%、萃取压强35MPa、夹带比9%、萃取时间40min,在此条件下总黄酮得率可达到23.24mg/g。可以运用超临界CO2流体萃取技术对竹叶黄酮进行提取,且提取效率较高。Supercritical CO2 fluid extraction technique was explored to extract total flavonoids from praecox leaves in northern areas of China.Single-factor design was used to determine main variables that influence extraction rate of total flavonoids.The optimal extraction conditions were achieved to be extraction temperature of 36 ℃,ethanol concentration of 50%,extraction pressure of 35 MPa,entrainer（absolute ethanol） amount of 1：15,entrainer amount 9% and extraction time of 40 min.Under the optimal extraction conditions,the extraction rate of total flavonoids was 23.24 mg/g.The supercritical fluid CO2 extraction can be used for the extraction of total flavonoids from praecox leaves with high extraction efficiency.

关 键 词：竹叶 超临界CO2流体萃取 总黄酮 提取 

分 类 号：O623.54[理学—有机化学]