Ag/AgCl reference electrode wich is "homemade" from silver wire anodisated from 5 N HCl for 10 min. using a 1.5 V source. See also "Electrochemistry at solid electrodes", autor: R.A. Adams, edit. M. Dekker. Inc., N.Y., 1969
I am not agree with Tanta Spataru as if we will use silver paint as electrodes in order to apply the ac or dc voltage then how we can be sure that the small silver ions don't contribute to the conductivity of the sample? As we cannot tolerate the contribution to the conductivity from the small silver ions thus one must use platinum as electrode instead of silver.............Good Luck...............