Optimization technology of Ultrasonic Extraction of Apple Polyphenol

The effect of the ultrasonic facilities variety and technological variety on the extraction of apple polyphenol,with the orthogonal experiment design,was studied.The result indicated:(1)The effect of ultrasonic facilities variety was frequency power,the effect has significant deviation at different levels of power,and has no significant deviation under different levels of frequency;(2)The relative importance of process variety in the extract efficient followed the order: solid / liquid rate pH extract temperature granularity size extracting period;(3)The compositive optimization variety of extracting process in ultrasonic assisted extraction was 40 kHz frequence,200 W power,70 ℃ extract temperature,30 min extracting period,pH 3,10:1 liquid /solid rate,granularity size 1.19 mm and 2 375.60 mg/kg extract yield was obtained.