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Effect of structural design of silver/silver chloride electrodes on stability and response time and the implications for improved accuracy in pH measurement.

Brewer, P J; Brown, R J C (2009) Effect of structural design of silver/silver chloride electrodes on stability and response time and the implications for improved accuracy in pH measurement. Sensors, 9 (1). pp. 118-130.

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Abstract

The response time of Ag/AgCl reference electrodes of the thermal electrolytic type is compromised by the microporous structure that limits the rate at which traces of any previous solution are diluted by any new solution environment. The time taken for an electrode to reach equilibrium when transferred from one electrolyte solution to another has been shown to change when different structural designs to the conventional sphere of Ag/AgCl are used. Electrodes fabricated with cylindrical architectures of Ag/AgCl have shown improved stability and reach equilibrium in half the time required for electrodes prepared with spheres of Ag/AgCl. This work has significant implications for the accuracy of the Harned cell used as a primary standard for pH measurement.

Item Type: Article
Subjects: Analytical Science
Analytical Science > Trace Analysis and Electrochemistry
Last Modified: 23 Jul 2018 13:25
URI: http://eprintspublications.npl.co.uk/id/eprint/4299

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