FOOD SCIENCE ›› 2004, Vol. 25 ›› Issue (10): 139-144.

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Study on Extracting PPT from Green Tea by Dual-frequency Ultrasound Technology

 CAO  Yan-Ping, LI  Jian-Yu, ZHU  Gui-Qing, LIU  Zuo-Cai   

  1. 1.College of Chemical and Environmental Engineering, Beijing Technology and Business University;2.College of Science, Beijing Institute of Technology
  • Online:2004-10-15 Published:2011-10-24

Abstract: Extracting PPT from green tea under single-frequency and dual-frequency ultrasounic field were studied, and theexperiment plan was done according to uniform design by DPS, or mathematical model and the optimize process condition wereobtained with PLS procedure. The result showed that the dual-frequency ultrasound technology is superior to single-frequencytechnology in PPT extraction about concentration, extract content and extraction velocity.

Key words: PPT of green tea, extraction, dual-frequency ultrasound, uniform design, mathematical model