通过单因素和正交试验,考察了料液比、超声波功率、提取时间和提取温度对杜仲叶总黄酮提取率的影响。结果表明:在料液比(g∶mL)1∶35、超声波功率80 W、提取时间20 min,提取温度50℃时,杜仲叶总黄酮提取率达8.45%。在缩短了提取时间和降低了能耗的同时,比常规水提和微波辅助水提杜仲叶总黄酮的提取率分别高0.96%和0.68%。

The ultrasound-assisted water extraction process of flavonoids from Eucommia ulmoides leaves was studied. Through single factor and orthogonal experiment,solid-liquid ratio,ultrasonic power,extraction time and temperature on the extraction rate were investigated. The results showed that: under the conditions of solid-liquid ratio1∶ 35,ultrasonic power 80W,extraction time 20min,extraction temperature 50 ℃,flavonoids extraction rate could reach 8. 45%. This process can shorten the extraction time and lower the energy cost. It was also 0. 96% and 0. 68%higher than the conventional water extraction and icrowave-assisted water extraction respectively.