Electrochemical Studies of Zinc/Cysteine Interactions

被引：3

作者：

Doan, M. Y. ^{[1
]}

Worosz, M. A. ^{[1
]}

Cheek, G. T. ^{[1
]}

机构：

[1] US Naval Acad, Dept Chem, Annapolis, MD 21402 USA

来源：

SELECTED PROCEEDINGS FROM THE 231ST ECS MEETING | 2017年 / 77卷 / 11期

关键词：

ANODIC OXIDE-FILMS; GOLD ELECTRODES; CYSTEINE; REDUCTION; ZN(II);

D O I：

10.1149/07711.1537ecst

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical behavior of L-cysteine has been investigated in the presence of ZnSO4 in pH 7.4 phosphate and pH 7.4 MOPS buffers. In the phosphate buffer, addition of ZnSO4 caused a cloudy appearance due to formation of zinc phosphate. A visual indication of the Zn2+/cysteine interaction was observed by the solution turning clear upon cysteine addition in a 1:2 Zn2+ : L-cysteine ratio. Voltammetry of L-cysteine at glassy carbon and gold electrodes revealed a +0.2 V shift in the L-cysteine oxidation peak potential upon addition of ZnSO4 to L-cysteine. A similar, but negative, shift in Zn2+ reduction potential was observed at glassy carbon in pH 7.4 MOPS buffer upon addition of L-cysteine. Voltammetric studies of L-cysteine at gold in pH 4.7 acetate buffer are included for comparison to those at pH 7.4

引用

页码：1537 / 1544

页数：8

共 14 条

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