华南理工大学学报(自然科学版) ›› 2009, Vol. 37 ›› Issue (4): 125-129.

• 食品科学与技术 • 上一篇    下一篇

茶皂素微波提取过程的优化及数学描述

吴雪辉1  张喜梅2   

  1. 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
  • 收稿日期:2009-01-16 修回日期:2009-02-19 出版日期:2009-04-25 发布日期:2009-04-25
  • 通信作者: 吴雪辉(1965-),女,博上,副教授,主要从事食品加工与综合利用研究. E-mail:xuehwu@scau.edu.cn
  • 作者简介:吴雪辉(1965-),女,博上,副教授,主要从事食品加工与综合利用研究.
  • 基金资助:

    广东省科技计划项目(2006820201023,2008A020100009)

Optimization and Mathematical Description of Microwave-Assisted Extraction of Theasaponin

Wu Xue-hui1  Zhang Xi-mei2   

  1. 1. College of Food Science, South China Agricultural University, Guangzhou 510642, Guangdong, China; 2. School of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2009-01-16 Revised:2009-02-19 Online:2009-04-25 Published:2009-04-25
  • Contact: 吴雪辉(1965-),女,博上,副教授,主要从事食品加工与综合利用研究. E-mail:xuehwu@scau.edu.cn
  • About author:吴雪辉(1965-),女,博上,副教授,主要从事食品加工与综合利用研究.
  • Supported by:

    广东省科技计划项目(2006820201023,2008A020100009)

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280s、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,燃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荼皂素的微波提取过程.

关键词: 微波, 提取, 油茶饼粕, 茶皂素, 数学模型

Abstract:

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.

Key words: microwave, extraction, camellia oleifera cake, theasaponin, mathematical model