Extraction of apple polyphenols in apple pomace by microwave technique

The optimal conditions of polyphenol extraction from apple pomace by microwave technique were identified,using alcohol as solvent.Some factors influenced polyphenols extraction such as ethanol concentration,ratio of material to liquid,size of material,microwave power,treatment time were studied.The results showed that the optimum conditions as follows:ethanol concentration was 60%,size of material was 40,ratio of material to liquid was 1∶10,microwave radiation was 350W,extraction time was 90s,the extraction rate of apple polyphenols could get 245.31mg/100g.The microwave technique is obviously better than heat loop extraction and ultrasonic extraction.