用乙酸乙酯提取虎杖中的白藜芦醇

Extraction of Resveratrol from Polygonum Cuspidatum with Ethyl Acetate

以白藜芦醇的含量为指标,通过单因素实验及正交实验确定了用乙酸乙酯提取虎杖中白藜芦醇的最佳工艺条件。结果表明,料液比1∶15,在75℃,提取2 h,从虎杖中提取的白藜芦醇质量分数可达2.33%(一阶导数光谱法),3.76%(紫外分光光度法)。

The extracting rate of resveratrol from polygonum cuspidatum is used as the index of evaluation, and studies the optimum conditions of extracting resveratrol from polygonum cuspidatum with ethyl acetate by single factor test and orthogonal design. The results show that the optimum extracting conditions of resveratrol from Polygonum Cuspidatum are followed：the ratio of material to liquid l：l5（g ： m L）, extracting temperature 75 ℃ and extracting time 2 h. Under these conditions, the extracting ratio of resveratrol reached 2.34%（first-derivative spectra method） and 3.76 %（UV-Spectrophotometric method）.