Experimental and numerical characterization of an electrode-matrix cell for electrochemical measurements

The present paper focuses on the experimental and numerical characterization of an electrode-matrix cell, designed and developed in order to perform electrochemical measurements in a wide range of electrolytic conductivity values. Different cell arrangements can be obtained by modifying the number and the position of the energized electrodes, leading to a variation of the cell constant. The comparison between modelling and experimental results has been performed on integral and local physical quantities (e.g. the electric potentials over non-energized electrodes), in order to explore the feasibility of a computable cell, which enables the achievement of high accuracy and metrological traceability. Finally, electrode arrays with different geometrical properties have been numerically investigated, to verify a possible extension of the range of variation of the cell constant and, consequently, of the electrolytic conductivity interval to be measured.