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Extraction Process of Pectin from Orange Peel with Ultrasonic-Assistant Solvent Method

JIN Chun-ying1,HUANG Qing-tian2,LIN jin-qing1,XU Xu-bo1,LI Hai-bing1 (1.Materials Science and Engineering College,Huaqiao University,Quanzhou 362021,Fujian China;2.Environment Protection Bureau,Nan'an 362300,Hujian China))  
Extracting pectin from orange peel with ultrasonic-assistant solvent method was studied,hydrochloric as solvent and ethanol as precipitator.The influencing factors including temperature,liquid-to-solid ratio,pH value of the solution and extracting duration are studied.The optimal process conditions were obtained by orthogonal analysis as follows:pH value 2.0,temperature 70 ℃,extracting duration 30min,the liquid-to-solid ratio was 40 mL/g,and at the condition the extracting rate of pectin was 13.9%.
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