玉米皮中亚油酸超临界CO_2萃取技术的研究  

Study on Technique of Supercritical CO_2 Extraction of Linoleic Acid in Corn Skin

作　　者：刘婷婷[1] 丁伟[1] 王大为[1] 

机构地区：[1]吉林农业大学食品科学与工程学院,吉林长春130118

出　　处：《食品科学》2007年第10期222-225,共4页Food Science

基　　金：国家"十五"重大科技攻关专项(2001BA501A01)

摘　　要：采用超临界CO2选择性萃取技术从玉米皮中提取亚油酸(LA)。对影响LA提取率的主要因素压力、温度、时间及CO2流量进行研究和分析,并利用气相色谱法(GC)对玉米皮亚油酸(CSLA)进行定性定量分析。通过正交试验优化萃取工艺条件,当萃取压力25MPa,萃取温度35℃,萃取时间90min,CO2流量25L/h时萃取效果最好,此时LA提取率为3.41g/100g玉米皮。Corn skin linoleic acid（CSLA） was extracted through supercritical CO2 fluid extraction technology. The major influence factors such as extraction pressure, extraction temperature, extraction time and CO2 flow were studied and analysised, and the conditions were determined. CSLA were qualitative and quantitative analysised through gas chromatography. Optimized the technological condition through orthogonal test, when the extraction pressure 25 MPa, temperature 35 ℃, time 90 min, CO2 flow 25 L/h, the result is best, the CSLA percentage extraction is 3.41 g per 100 g corn skin.

关 键 词：超临界CO2萃取 玉米皮 亚油酸 气相色谱 

分 类 号：O658.2[理学—分析化学]