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茶叶科学 ›› 2003, Vol. 23 ›› Issue (1): 66-70.doi: 10.13305/j.cnki.jts.2003.01.014

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儿茶素的碱缓冲能力及与Al3+络合作用的研究

唐德松, 沈生荣   

  1. 浙江大学茶学系,浙江 杭州 310029
  • 收稿日期:2002-12-19 修回日期:2003-03-17 出版日期:2003-05-25 发布日期:2019-09-16
  • 作者简介:唐德松(1976- ),男,浙江大学茶学系研究生,主要从事茶叶综合利用和生物化学的研究。

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

摘要: 研究了三种儿茶素((+)-C,(–)-EC,EGCG)对碱的缓冲能力,Al3+对儿茶素缓冲能力的影响及EGCG与Al3+的络合作用。结果表明,儿茶素溶液对碱有较强的缓冲能力,酯型儿茶素更强,EGCG约是EC或者C的两倍;在儿茶素与Al3+络合过程中,儿茶素的紫外–可见吸收在274βnm处逐渐下降,而322βnm处逐渐升高;EGCG与Al3+的络合度为1:1。

关键词: 茶学, 儿茶素, Al3+, 缓冲能力

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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