I need to find the bulk resistance of an hydrogel, for that i was told i could do EIS a 3 electrode cell. Problem is i dont know what i should use as electrolyte solution. I read a paper that did this using a GC WE with the tip coated with the hydrogel, then the CE was a graphite bar, the reference electrode was Ag/AgCl and the electrolyte was 0.1 KCl while the redox pair was (K4Fe(CN)6 * 3 H2O) and K3Fe(CN)6 both at 5mM.
The hydrogels tested were, alginate with different concentrations of RGO ( reduced graphene oxide), colagen with RGO and CNF with RGO.
i would love to get any info on how to pick the electrolyte solution and redox pair.
Thanks
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