Extraction of polyphenols from Emilia sonchifolia (Linn)DC. by ultrasonic and semi-bionic

In order to optimize the extraction conditions of polyphenols from Emilia sonchifolia (L.) DC. by ultrasonic and semibionicu,base on the single test, orthogonal experiment was carried out to investigate 4 influential factors inclding ultrasonic extraction temperature, power of ultrasonic extraction, extraction time and ratio of solid-liquid. The results showed that the optimum extraction conditions for the ultrasonic were as following: the power of ultrasonic extraction was 60 W, the ratio of solid-liquid was 1：30, extracting at 60℃ for 25 min. The extraction yield was 12.08 mg/g, the recovery was 99.74%, RSD was 0.30%. The result indicated that it is applicable to extracting polyphenols from E. sonchifolia (L.) DC. by ultrasonic and semi-bionic.