香薷黄酮的超声波辅助提取

以脱脂后的香薷油粕为原料,采用超声波辅助提取法提取香薷中的黄酮,分光光度法测定黄酮含量。分析溶剂浓度、料液比、提取时间、提取温度等因素对黄酮提取率的影响,采用正交实验优化提取条件。结果表明,香薷黄酮提取率的影响因素大小顺序为:料液比超声时间乙醇体积分数超声温度;最佳条件为:乙醇体积分数60%,料液比1∶30 g/mL,温度60℃,提取时间30 min;在此条件下黄酮的提取率为4.17%。

Study on Ultrasonic Extraction of Flavone in Elsholtzia

Elsholtzia flavone was extracted based on Elsholtzia oil meal by ultrasonic wave extraction,the content of Elsholtzia flavone was determinated by Colorimetry. The effect of single factor experiment by solvent concentration,liquid to solid ratio,extraction time,extraction temperature,and the extraction conditions on the extraction rate of flavonoids was investigated,the extraction conditions were optimized by orthogonal experiment. The experiment showed that the order affection of the extraction rate of flavonoids from Elsholtzia was: liquid to solid ratio > extraction time > extraction temperature > ethanol concentration; optimum conditions are: ethanol concentration of 60%,solid to liquid ratio of 1∶ 30,extraction temperature of 60℃,extraction time of 30 min. Under these conditions,the extraction rate of flavonoids was 4. 17%. The study would provide important guiding for the full use of the resources.