Abstract: The study is about the kinetic model on the extraction of flavonoids from Aralia chinensis L based on the mechanism of extraction and diffusion. Firstly the concentration of flavonoids at different temperature and extraction time were measured. It is found that the concentration increased with the increase of temperature and extraction time and finally reached the equilibrium. Then the kinetic model of flavonoids extraction was established according to Fick’s second law of diffusion and ball model，and the kinetic parameters，including rate constant，activation energy，yield and the diffusion coefficient，were obtained. The established kinetic model provided a foundation for the optimization of technological conditions and further theoretical study.

Key words: Aralia chinensis L, flavonoids, extraction, kinetic model

摘要： 根据天然植物中活性成分提取机理和扩散理论，对飞天蜈蚣七中黄酮提取的动力学进行研究。首先在不同提取温度、提取时间下测定提取液中黄酮的浓度，发现随着提取温度的升高、提取时间的增长，黄酮浓度不断增加并最终趋于平衡；然后以Fick第二定律、球形模型为基础建立提取过程中的动力学模型并求得了速率常数、活化能、内扩散系数、相对萃余率等动力学参数。建立的动力学模型可为飞天蜈蚣七黄酮提取的工艺条件优化和深层次研究奠定理论基础。

关键词: 飞天蜈蚣七, 黄酮, 提取, 动力学模型