超声强化溶剂提取车前草中总黄酮的研究

采用超声技术对车前草中总黄酮提取进行强化，选择料液比、超声提取时间、提取温度、超声功率四因素进行正交实验，得出影响总黄酮提取率大小的次序先后为：提取温度〉超声功率〉超声提取时间〉料液比。在实验参数的基础上，为了获得较高的提取率和节省溶剂用量，各因素的优化工艺参数为：料液比1：20，超声提取时间30min，超声提取温度为50℃，超声功率为200W，在这个最佳条件下试验，总黄酮的提取率为0．645％。相对常规回流提取法而言，采用超声法提取具有快速、节省溶剂、节省时间、提取的有效成分含量较高等优点。

Study on ultrasound enhanced extraction of the total flavonoid from Plantago

A novel extraction process of the total flavonoid from Plantago by ultrasound has been studied. The optimum extracting conditions of the total flavonoid are investigated by using orthogonal experimental design. The significance of these factors affecting the total flavonoid is in the following order： extraction temperture 〉 ultrasound power 〉 ultrasound time 〉 solid/liquid ratio. The optimal parameters are： solid/liquid ratio 1：20 g/mL, ultrasound extraction time 30min, extraction temperature 50℃, ultrasound power 200W. Under this optimal condition, the extraction rate of flavonoid is 0.645%. Compared with conventional extraction, it is more effective with advantages in short extraction period, higher yield and saving solvent amount.