Study on the Extraction Technology of Total Flavonoids from Oroxylum indicum

Objective To study the optimal extraction technical parameters of total flavonoids from Oroxylum indicum by ultrasonic-assisted extraction. Methods Single-factor analysis and orthogonal design with baicalin as a standard were used to review and optimize the extraction process according to extraction yield of total flavonoids in the same conditions. Results The order of factors which affected the flavonoids extraction was time of ultrasonic treatment ultrasound power ratio of liquid to material ethanol concentration,and the best match was A1B3C2D3. Conclusion The best extraction conditions of Oroxylum indicum can be established as follows: alcohol concentration 60% ,at the solid-liquid ratio of 1: 30,each time 50 min for 1 time and ultrasound power 210 W,the content of total flavonoids is 23. 829% .