通过测定水或乙醇提取过程中EGCG的浓度-时间变化,结合数学模型推导,采用二次拟合和析出方程回归,研究并揭示了茶表没食子儿茶素没食子酸酯提取的动力学规律,为其提取工艺设计提供理论依据。研究提出了获得最佳提取时间及不同提取条件下的动力学方程。结果表明该方程拟合是成功的,EGCG提取符合传质扩散动力学规律。

By using the determination on the change of EGCG concentration with time in the course of extraction by water or ethanol, and the application of mathematical model derivation and equation regression methods, the kinetic rule in extraction of tea EGCG was investigated and disclosed in this paper. An optimized extracting time and kinetic equation in different conditions were put forward. Results showed that the equation optimization was succeeded and the extraction of EGCG complied to diffusion kinetic rules.