I want to measure the resistance of medium at a fixed frequency by inducing constant ac current and then measuring the voltage drop across the medium. Ag/AgCl pallets are cheaper than Ag/AgCl reference electrodes. What is the actual difference between them and how are they different and what types of experiments are they most suitable for?
Dear Dr. Bibek Raut,
the use of Ag/AgCl quasi-reference electrodes, can interfere with the electrochemical measurements and cause non-negligible artifacts. The artifacts are attributed to the redox reactions and adsorption/desorption processes of Ag/AgCl residues of quasi-reference electrodes that dissolve in solution on top of a microelectrode array chip. Having performed a range of investigative experiments, we come to a conclusion that these signals come from direct oxidation/reduction of Ag/Ag+ nanoparticles at the microelectrodes.
For more details, please see the source:
-Electrochemical artifacts originating from nanoparticle contamination by Ag/AgCl quasi-reference electrodes
Alexey Yakushenko, Dirk Mayer, Johan Buitenhuis, Andreas Offenhäusser and Bernhard Wolfrum
Lab Chip, 14, 602-607 (2014)
https://doi.org/10.1039/C3LC51029H
Available at: https://pubs.rsc.org/en/content/articlelanding/2014/lc/c3lc51029h#!divAbstract
Best regards, Pierluigi Traverso.
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