An evaluation and comparison of cross-sensitivities of various different types of screen printed Ag/AgCl reference electrodes

摘要

Different types of thick film screen printed silver and silver-silver chloride (Ag/AgCl) electrodes have been evaluated for use as solid state alternatives to liquid electrolyte filled Ag/AgCl reference electrodes. The tested electrodes included those employing different types of binder (glass and polymer) for the Ag/AgCl layer, those consisting of a bare silver (pseudo reference) electrode and those with a bare silver electrode with an additional covering layer of a polymer bound KCl salt matrix. The cross-sensitivities of these different electrodes to several different ion species (e.g. chlorides, nitrates and phosphates) were examined by recording their electro potentials in varying ionic strength solutions.