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.
TANG De-song
,
SHEN Sheng-rong
. Study on Catechins’ Buffer Abilities to OH– and Their Complex with Al3+[J]. Journal of Tea Science, 2003
, 23(1)
: 66
-70
.
DOI: 10.13305/j.cnki.jts.2003.01.014
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