FOOD SCIENCE ›› 2008, Vol. 29 ›› Issue (1): 50-54.

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Study on Formation of Theaflavins with Acidic Oxidation

 ZHANG  Jian-Yong, JIANG  He-Yuan, JIANG  Yong-Wen-   

  1. 1.Key Laboratory of Tea Chemical Engineering, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agriculture Sciences, Hangzhou 310008, China; 2.Graduate School of Chinese Academy of Agriculture Sciences, Beijing 100081,China
  • Online:2008-01-15 Published:2011-07-28

Abstract: FeCl3, Fe2(SO4)3 and Fe(NO3)3 were chosen as acidic oxidants. The oxidation of tea polyphenols together with acidic oxidant was studied. Results showed that tea polyphenols can be oxidized and theaflavins (TFs) are formed under the catalysis of FeCl3, Fe2(SO4)3 or Fe(NO3)3 with the highest content of theaflavins produced at 40 mg/ml of acidic oxidant. The oxidative mechanism of tea polyphenols by acidic oxidant was also discussed.

Key words: tea polyphenols, acidic oxidation, theaflavins, oxidative mechanism