Electrochemical and theoretical complexation studies for Zn and Cu with individual polyphenols

被引：71

作者：

Esparza, I

Salinas, I

Santamaría, C

García-Mina, JM

Fernández, JM

机构：

[1] Univ Navarra, Dept Quim & Edafol, E-31080 Pamplona, Navarra, Spain

[2] INABONOS, Navarra 31160, Spain

来源：

ANALYTICA CHIMICA ACTA | 2005年 / 543卷 / 1-2期

关键词：

Zn; Cu; polyphenols; flavonoids; complexation; DPASV;

D O I：

10.1016/j.aca.2005.04.029

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Zn and Cu interactions with three selected flavonoids (catechin, quercetin and rutin) have been electrochemically monitored. It has been shown that catechin takes one atom of metal per molecule; quercetin takes two atoms, and rutin is able to take up to three atoms. Not all ligands bind metals equally strong, and weakly bonded metals can be distinguished. Zn shows a sluggish kinetics and, at the same time, the highest conditional formation constants. The method could be applied to a real sample. Theoretical models are proposed for the most favourable compounds. (c) 2005 Elsevier B.V. All rights reserved.

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页码：267 / 274

页数：8

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