FOOD SCIENCE ›› 2005, Vol. 26 ›› Issue (4): 174-177.

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Study on Comprehensive Extraction of Tea Polyphenols,Cafeine,Theanine and Tea Polysaccharides

 CHEN  Rong-Yi, ZHANG  Xin-Shen, SHEN  Jin-Shan, XIE  Jun   

  1. 1.College of Light Industry and Textile and Food Engineering, Sichuan University; 2.Test Center of South China Agriculture
  • Online:2005-04-15 Published:2011-09-19

Abstract: Tea caffeine, theanine polysaccharidcs and polyphenols were purified from the extract of green tea with ZJL macroporous cation exchange resin and ZJX macroporous adsorption resin with column chromatography respectively. The optimal operation conditions were obtained by the static and dynamic state experiments. Production rate and purity of caffeine were 1.9% and 83.23% respectively. Production rate and purity of theanine were 0.94% and 85.43% respectively. Production rate and purity of tea polyphenols were 12.35% and 95.62% respectively. The content of caffeine in tea polyphenols was less than 0.7%. Production rate and purity of tea polysacchadides were 1.1% and 51% respectively.

Key words: tea polyphenols, caffeine, theanine, tea polysacchadides, extraction