加压提取槐米黄酮的动力学研究

Dynamic on the pressurized extraction of flavonoids from Sophora japonica L.

采用加压提取法提取中药槐米中的黄酮类成分,以提取率为指标,考察不同温度下槐米黄酮提取率随时间变化的规律。结果表明,升温阶段的提取动力学模型为ln(C∞/C∞-Ct)=kt+ln(C∞/C∞-C0)在恒温阶段,提取动力学符合1-2/3α-(1-α)1/3=k2t,根据阿伦尼乌斯方程得出升温和恒温阶段的提取活化能分别为-214.76、-516.26 kJ/mol。

Pressurized extraction was used to extract the flavonoids from Sophora japonica L, the extraction ratio was choosed as the index, and the extraction rate varies with time under different extraction temperatures was investigated. The result shows that in the heating stage, the extraction kinetics model is and 1-2/3α-（1-α）1/3=k2t in the constant temperature stage. The activation energy of extraction process for heating and constant temperature stages are respectively -214.76 kJ/mol and -516.26 kJ/mol based on the Arrhenius equation.