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Journal of Tea Science ›› 2003, Vol. 23 ›› Issue (1): 66-70.doi: 10.13305/j.cnki.jts.2003.01.014

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Study on Catechins’ Buffer Abilities to OH and Their Complex with Al3+

TANG De-song, SHEN Sheng-rong   

  1. Teascience department, Zhejiang University. Hangzhou, 310029
  • Received:2002-12-19 Revised:2003-03-17 Online:2003-05-25 Published:2019-09-16

Abstract: In this paper, reactions of catechins chelating with Al3+ were studied. The results showed that, catechins have strong buffer abilities to OH, and EGCG’s is stronger than that of E or EC, After adding Al3+ to catechin solution, its pH value decreased and absorbance at 274βnm went down and at 322βnm went up. The ratio of EGCG-Al in the complex is 1:1.

Key words: Tea science, Catechins, Al3+, Buffer ability

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