超声波辅助提取陕北野生苦菜中单宁的工艺优化

Optimizition of Ultrasonic-Assisted Extraction of Tannins from Wild Patrinia villosa in Northern Shaanxi

采用超声波辅助法对陕北苦菜中单宁的提取工艺进行了优化。通过单因素和正交试验,考察乙醇体积分数,料液比,超声温度及时间4个因素对苦菜单宁提取率的影响,继而得出了其最佳提取工艺条件:乙醇体积分数为50%,料液比1︰60 (g/mL),超声温度50℃,超声时间40 min。超声波辅助提取法具有用时短,提取温度低,提取效率高等优点,从而为苦菜中单宁的开发利用提供了参考依据。

The ultrasonic-assisted extraction technology of tannins from wild Patrinia villosa in northern shaanxi was optimized.Through the single factor and orthogonal experiment,the effects of four factors(ethanol concentration,solidliquid ration,ultrasonic temperature and time)on the extraction yields of tannins were investigated,the optimum extraction conditions are obtained as following:ethanol solution of 50%,ratio of wild Patrinia villosa and the solvent of 1∶60(g/mL),temperature of 50℃and extracting time of 40 min.The ultrasonic-assisted extraction method had many advantages such as short extraction time,low extraction temperature,high extraction efficiency and so on,which provided the references for the development and utilization of tannins from wild Patrinia villosa.