An improved approach for fabricating Ag/AgCl reference electrodes

被引：48

作者：

Brewer, Paul J. ^{[1
]}

Leese, Rebecca J. ^{[2
]}

Brown, Richard J. C. ^{[1
]}

机构：

[1] Natl Phys Lab, Analyt Sci Div, Teddington TW11 0LW, Middx, England

[2] Univ Southampton, Sch Chem, Southampton SO17 1BJ, Hants, England

来源：

ELECTROCHIMICA ACTA | 2012年 / 71卷

关键词：

pH; Harned cell; Ag/AgCl electrode; Primary methods; Repeatability; SILVER/SILVER CHLORIDE ELECTRODES; HARNED CELL MEASUREMENTS; ELECTROCHEMICAL IMPEDANCE; PH MEASUREMENT; PERFORMANCE; SENSITIVITIES; ACCURATE; HISTORY;

D O I：

10.1016/j.electacta.2012.03.164

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We report an improved approach for fabricating Ag/AgCl reference electrodes for use in Harned Cell measurements of pH. Standard fabrication procedures involve converting a proportion of Ag to AgCl. This is usually driven by applying a fixed current, instead the novel approach presented here uses a fixed potential. This has resulted in an ensemble of electrodes of superior repeatability. The transient current data provides an indication of the geometric surface area of each electrode, offering important information about the microstructure. This approach has far-reaching implications for improving the repeatability of Ag/AgCl electrodes and reducing uncertainty in pH measurement. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：252 / 257

页数：6

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