Experimental Study on Polyphenol Extraction from Pomegranate Peel in Sichuan Huili by Microwave Extraction

[Objective] The study aimed to provide an important reference for the industrial preparation of polyphenol from pomegranate.[Method]The polyphenol was extracted form pomegranate peel in Sichuan Huili by microwave extraction method and the orthogonal experiment was carried out to determine the optimum extraction technology.[Result] With water as solvent and solid-liquid ratio was 1∶ 20,the extraction rate of polyphenol was increased with the rise of extraction temperature and it reached the biggest at 60 ℃.With 30% ethanol as extractant,the extraction rate was higher by applying the compound extraction system of water-ethanol when the microwave extraction condition was as follows: extraction power was 300 W,extraction time was 90 s and extraction times was 2.The influence of factors on the extraction rate of polyphenol from pomegranate peel in order was extraction power extraction temperature extraction time extraction times.[Conclusion] With microwave extraction,the optimum extraction condition of polyphenol from pomegranate peel was 30% ethanol,solid-liquid ratio of 1∶ 20,extraction power of 300 W,extraction temperature of 60 ℃,extraction time of 100 s,extraction times of 3.Under the conditions,the extraction rate reached 26.91%.