食品科学 ›› 2001, Vol. 22 ›› Issue (8): 32-37.

• 基础研究 • 上一篇    下一篇

茶叶萃取的动力学与浸出平衡机理的研究

罗龙新   

  1.  广东华城食品有限公司
  • 出版日期:2001-08-15 发布日期:2012-02-13

Study on infusion kinetics and parameters in the state of infusion equilibrium

 LUO  Long-Xin   

  • Online:2001-08-15 Published:2012-02-13

摘要: 实验和分析结果表明,茶叶中可溶性物质的浸出过程中,在叶片内部的扩散是一个限速阶段,而不是两相界面间膜内薄膜的阻力。用动力学的浸出速率(K)、活化能(E)以及分离常数(K)、扩散系数(D)等参数可反映可溶性物质(如咖啡因、茶黄素和茶红素)的浸出特性。

关键词: 茶叶, 萃取, 动力学, 浸出平衡, 机理

Abstract: The experiment results have shown that the diffusion inside the tea leaves is a rate-determining step in the water extraction of constituents from the tea.It was not due to the resistance of the layer.The infusion parameters of tea constituents (such as caffeine,theaflavins) could be defermined by kinetic equation(rate of infusion,activation energy),partition constant and diffusion coefficient in the state of infusion equilibrium.

Key words:  , Tea Constituents Infusion Kinetics Mechanism;