An improved approach for fabricating Ag/AgCl reference electrodes

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 f...

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Bibliographic Details
Published in:Electrochimica acta 2012-06, Vol.71, p.252-257
Main Authors: Brewer, Paul J., Leese, Rebecca J., Brown, Richard J.C.
Format: Article
Language:English
Subjects:
Ag/AgCl electrode
Chemistry
Electrochemistry
Electrodes
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Harned cell
Microstructure
Other electrodes
Primary methods
Repeatability
Reproducibility
Silver
Surface area
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Summary: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.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2012.03.164