Optimization of Extraction Technology of Polyphenols from Yacon Peel by Response Surface Method

In the research,yacon peel was used as material to extract polyphenols by ethanol extraction method.On the basis of single factor experiment,this paper studied the effects of the extraction time,extraction temperature and ratio of liquid to solid on the extraction amount of polyphenols through the response surface method,and optimized the extraction process parameters of polyphenols from yacon peel.The results showed that,the optimum extraction conditions were as follows:extraction temperature was 52 ℃,extraction time was 62 min,the ration of liquid to solid was 30∶1.Under the conditions,the extraction amount of polyphenols was 21.46 mg/g,and it was basically consistent with the predicted value(21.48 mg/g).