关键词: 飞天蜈蚣七, 黄酮, 提取, 动力学模型

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