Study on the Extraction Process of Total Flavonoids from Jujube Core by Ultrasonic Wave Extraction

[Objective] The research aimed to study the optimum extraction technique of total flavonoids from Jujube core by ultrasonic wave.[Method] Taking the content of total flavonoids as the observation index,the conditions for the extraction by ultrasonic wave were studied and the optimum extraction process was obtained by orthogonal experiment.[Result]The optimum extracting conditions were showed as following:solid to liquid ratio of 1∶10,at 70 ℃,ultrasonic power 90 W,for 50 min with 60% ethanol;under these conditions,the total content of flavonoids was 7.22 mg/g.[Conclusion] The procedure was convenient,appropriate and feasible,it provided a feasible way for the comprehensive utilization of the Jujube core.