With peel residues of Guangxi Wuming Orah mandarin as raw material,based on single factor experiments,by use of an orthogonal test,the experiment is to optimize the process of extracting polyphenols and make research on antioxidant activity of the extracted polyphenols solution.The results showed that the optimal extraction scheme is as follows:the ratio of citrus peel to solvent is 50∶1;the concentration of ethanol solution is 50％;the temperature and power of the ultrasonic cleaner are respectively 60℃ and 70W.Under these conditions,the extraction rate of polyphenols from peel residues of Guangxi Wuming Orah mandarin reaches 17.831 mg/g after three times of measurement.In addition,the removal rate of DP-PH free radicals by the extracted polyphenols mentioned above increases with the increase of concentration.When the con-centration of polyphenol solution was 0.4 mg/mL,the removal rate reached 56.78％at its maximum,indicating good remov-al effect.
维普
万方数据