I am fabricating the screen printed carbon electrodes with Ag/AgCl reference electrode, carbon working and carbon counter electrodes. How can I validate its parameters and functioning? Is there any defined set of standards regarding electrical conductivity and resistance? How shall I carry out the electrochemical characterization?
This is a sensible question, though there is no standard test, and companies that make screen-printed electrodes won't share their approach. I would suggest validating for a specific small set of applications, because no screen-printed carbon electrode can be ideally suited for every possible electrolyte and/or current density. It's worth keeping in mind that most of the commercially available products are only designed for single use, and they are rarely stabilized before measurement (wetting the porous carbon and reaching a stable OCP often takes longer than a few minutes).
You could choose a few electrolytes and electrochemical measurements for your tests, then I suggest repeating the same tests across multiple electrodes of the same batch and between batches. If you're trying to match a particular commercial screen-printed product, do the same test on those and compare that repeatability with your electrodes.
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