FOOD SCIENCE ›› 2007, Vol. 28 ›› Issue (2): 84-87.

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Degradation Kinetics of Potato Starch Paste under Ultrasonic Irradiation

 LI  Jian-Bin, LI  Lin, GUO  Si-Yuan, LI  Bing, WEN  Xue-Xin   

  1. 1.College of Light Industry and Food Science, South China University of Technology, Guangzhou 510640,China; 2.College of Light Industry and Food Engineering, Guangxi University, Nanning 530004,China
  • Online:2007-02-15 Published:2011-12-31

Abstract: The ultrasonic degradation of potato starch paste was undertaken in a reactor. The experimental results showed that the molecular weight and the intrinsic viscosity of potato starch paste decrease with ultrasonic irradiation time, and are approaching two limiting values respectively, below which no further degradation may take place. Ultrasonic degradation kinetics can be explained with the following equations: Mt=50.97×104+572.77×104e-0.216t orηt=0.81+6.556×e-0.229t. The scission of chains in potato starch paste is random in the initial stage, and then non-random.

Key words: potato starch paste, ultrasonic, molecular weight, intrinsic viscosity, degradation kinetics