Ultrasonic-assisted Extraction of Pectin fromPitaya Peel
HU Ling ，ZHANG Xiao-li，YOU Xin-xia
（Zhengzhou University of Science and Technology，Zhengzhou 450064，China）
Abstract: In order to explore the influence of different extraction conditions on the extraction rate of pectin from pitaya peel，the best extraction conditions and extraction rate of pectin were obtained.Using dried pitaya peel as raw material，pectin in pitaya peel was extracted by ultrasonic wave，and the extraction rate of pectin was used as the measurement index. Through the single factor experiment and orthogonal experiment， the preferable ultrasonic extraction technological condition were set up.The results showed that the optimal extraction process of pectin from pitaya peel by ultrasonic wave was as follows: solid-liquid ratio 1∶20，ultrasonic power 180W，extraction time 60min，extraction temperature 50℃. Under the optimal extraction process，the extraction rate of pectin is as high as 12.65%，which provides theoretical basis for the development and application of pitaya peel.
Key words: ultrasonic wave；pitaya peel；extraction rate；pectin
（2020年 第23卷 第2期）