茶皂素微波提取过程的优化及数学描述  

Opti mization and Mathematical Description of Microwave-Assisted Extraction of Theasaponin

作　　者：吴雪辉[1] 张喜梅[2] 

机构地区：[1]华南农业大学食品学院,广东广州510642 [2]华南理工大学轻工与食品学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2009年第4期125-129,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：广东省科技计划项目(2006B20201023;2008A020100009)

摘　　要：为充分利用油茶饼粕资源,采用正交试验法探讨了影响微波提取油茶饼粕中茶皂素效果的因素,优化出茶皂素提取工艺如下:微波功率800W、辐射时间280 s、固液质量比1∶18、原料粒度小于180μm.此条件下茶皂素的得率为11.98%.在此基础上,针对影响微波提取茶皂素效果的微波功率、辐射时间、提取剂用量、原料粒度等因素,采用"黑箱方法",建立起各影响因素与茶皂素提取效果之间的综合数学模型,然后再逐渐逼近实验数据,用软件Matlab 7.3按最小二乘法原则,确定模型中的待定系数值.最后用试验结果对该模型进行验证,所得理论值和实验值之间的最大绝对误差为0.016%,说明该模型准确描述了油茶饼粕中茶皂素的微波提取过程.In order to make full use of the cake of camellia oleifera, theasaponin was extracted with microwave irradiation. Then, by the orthogonal test, factors affecting the extraction efficiency were analyzed, and the optimal extraction conditions were determined as： a microwave power of 800 W, a solid-to-liquid mass ratio of 1： 18, a raw material size of less than 180μm and an irradiation duration of 280s. In the optimal conditions, the yield of theasaponin reached 11.98%. Furthermore, by considering such factors as the microwave power, the irradiation time, the solvent dosage and the raw material size, a mathematical model describing the relationship between the factors and the extraction efficiency was established based on the Dark-Box method, and the parameters of the model were determined by means of the least square method with Matlab 7.3. The proposed model was finally verified by experiments, with a maximum absolute error of 0. 016% being obtained. It is thus concluded that the proposed model correctly describes the microwave-assisted extraction of theasaponin from the cake of camellia oleifera.

关 键 词：微波 提取 油茶饼粕 茶皂素 数学模型 

分 类 号：TS229[轻工技术与工程—粮食、油脂及植物蛋白工程]