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

doi:10.13305/j.cnki.jts.2003.01.014

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

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

作者信息 +

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

TANG De-song, SHEN Sheng-rong

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文章历史 +

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。

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.

导出引用

唐德松, 沈生荣. 儿茶素的碱缓冲能力及与Al³⁺络合作用的研究[J]. 茶叶科学. 2003, 23(1): 66-70 https://doi.org/10.13305/j.cnki.jts.2003.01.014

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 https://doi.org/10.13305/j.cnki.jts.2003.01.014

中图分类号： Q586

参考文献

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