Study on the Technology of Total Polyphenol from Radix tinosporae by Ultrasound-assisted Extraction

[Objective]The research aimed to study the optimum extraction technology of total polyphenol in Radix tinosporae. [Method] Extraction of total polyphenol in Radix tinosporae was carried out by ultrasound technology,the effects of ethonal concentration,ultrasound power,ratio of liquid to raw materials and extraction time to the extraction ratio of total polyphenol was investigated by the orthogonal design.[Result]The optimized conditions were the ethonal concentration 50%,ratio of liquid to raw materials 1∶ 40,extraction time 60 min,ultrasound power 100 W,the yield of total polyphenol was 25. 078 2 mg / g at the optimized condition. [Conclusion]The study provides the theoretical basis for the further development of Radix tinosporae.