ABSTRACT
Objective To optimize the extraction process of Euphorbia hirta L.by Central composite design/response surface methodology with ethanol by the ultrasonic extraction technology.Methods Based on the single factor experiment and central composite design-response surface methodology,the content of quercitroside was regarded as evaluation index,select ethanol concentration,extraction time,and solid-liquid ratio as three evaluation factors to achieve the purpose. Results The results indicated that the optimal extraction process was obtained as follows:10 times the amount of 60% ethanol under ultrasound for 2 times,50 min each;the average content of the quercitroside was 2.39 mg/g.Conclusion The method to optimize the extraction process is simple and reasonable.
