响应面法优化超声波辅助提取姜黄素类化合物工艺及动力学分析

Technology and kinetic analysis of curcumin extraction from Curcuma longa L.using ultrasonic-assisted method

研究了超声波辅助提取姜黄根茎中姜黄素类化合物的工艺条件,以姜黄素类化合物得率为考察指标,以乙醇浓度、料液比、提取温度、提取时间和超声功率为试验因素,通过单因素试验、Plaekett-Burman试验和响应面法对提取工艺条件进行了优化。在此基础上建立了不同温度下的姜黄素类化合物提取动力学模型。结果表明:姜黄素类化合物提取的最佳工艺为乙醇浓度80.4%,料液比1∶21.9 g/m L,提取温度41℃,提取时间40 min,超声功率200 W。在此条件下的姜黄素类化合物得率达到4.43%;在不同温度下建立的姜黄素类化合物提取动力学模型,即:Logistic模型、Sgompertz模型、Slogistic1模型能够很好地模拟姜黄素类化合物的提取过程。

This paper studied the conditions of curcumins extraction from Curcuma longa L. using ultrasonic-assisted method. Single factor method,Plaekett-Burman experimental design and the response surface analysis were applied to optimize the extraction process employing curcumins yield as the observation index and ethanol concentration,solid/liquid ratio,extraction temperature,extraction time and ultrasonic power as the independent variables. Under the optimized extraction conditions,the dynamic model of the extraction process at different temperature was established. Results showed that the optimal extraction conditions for curcumins extraction were determined as follows：ethanol concentration ：80.4%;solid/liquid ratio ：1 ∶ 21.9 g·m L-1;ultrasonic temperature ：41℃;ultrasonic time ：40 min and ultrasonic power ：200 W;Under these conditions,the yield of curcumins was 4.43%,and the kinetics models which are Logistic model,Sgompertz model and Slogistic1 model,can well simulate the extraction process at different temperatures.