FOOD SCIENCE ›› 2009, Vol. 30 ›› Issue (24): 197-201.doi: 10.7506/spkx1002-6630-200924042

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Characterization of Apple Pectin Fractionated by Ultrafiltration

TIAN Yu-xia1,QIAO Shu-tao2,QIU Nong-xue1,*,DENG Hong1,GUO Yu-rong1   

  1. 1. College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710062, China;
    2. College of Mechanical Instrumental Engineering, Xi'an University of Technology, Xi'an 710062, China
  • Received:2009-01-04 Revised:2009-04-06 Online:2009-12-15 Published:2010-12-29
  • Contact: QIU Nong-xue1,*, E-mail:nongxueq@snnu.edu.cn

Abstract:

Five ultrafiltration membranes with different molecular weight cut-off (MWCO) were applied to fractionate apple pectin, and totally 6 fractions with different viscosity-average molecular weight were obtained, among which the viscosity average molecular weight of 68.04% apple pectin was above 300 kD. Meanwhile, molecular weight of pectin was related to its physico-chemical properties, and the galacturonic acid content and degree of esterification increased with the increase of the molecular weight.

Key words: apple pectin, ultrafiltration, GC

CLC Number: