微波辅助提取龙胆果胶的工艺研究

以果胶提取率为考察指标,在考察单因素提取时间、提取温度、微波功率、料液比和粒径的基础之上,采用正交实验优化提取条件,研究微波辅助提取龙胆果胶的工艺条件。龙胆草中果胶最佳提取工艺为:微波辐射功率700 W,提取时间15 min,提取温度90℃,龙胆草粒径120目,料液比为1∶30(g/mL)。在此条件下,龙胆果胶的提取得率达到7.51%±0.12%。该法操作简单且提取率高,为工业化龙胆果胶的生产提供了一定的数据支撑。 

Study on extraction technology of pectin from Gentiana scabra by microwave-assisted method

Taking the extraction rate of pectin as index,orthogonal test was employed to optimize the extraction process and determine the microwave-assisted extraction technology of pectin based on the single factors including extraction time,extraction temperature,microwave power,ratio of solid to liquid and particle size of sample. Results showed the optimum extraction conditions were as follows: microwave power of 700 W,extraction time of 15 min,extraction temperature of 90 ℃,particle size of 120 mesh and solid / liquid ratio of 1∶30(g/mL).Under these conditions,the yield rate of pectin from Gentiana scabra have reached 7.51% ± 0.12%. The method was simple in operation and possessed high extraction rate,which provided given data support for the industrial production of pectin from Gentiana scabra.