An Application of a Porous Charcoal Junction to a Reference Electrode in Acidic and Alkaline Solutions

Jun-Seob LEE

doi:10.5796/electrochemistry.20-00010

Abstract

Charcoal is used as a salt bridge at the end of the Ag/AgCl reference electrode in acid and alkaline solutions. The impedance and the phase shift of the Ag/AgCl wire with the use of the charcoal junction are stable in all solutions, while those with the use of the glass frit show instability in the strong acid and alkaline solutions. Electrochemical impedance spectroscopic results on type 304 stainless steel surfaces are successfully obtained using the reference electrode with the charcoal junction, while the glass frit in strong acid and alkaline solutions shows inconsistency on the steel surfaces.

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This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium provided the original work is properly cited. [DOI: 10.5796/electrochemistry.20-00010].
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