Impedance Sensitivity of Analytical Cell with Interdigitated Microelectrods to Conductivity of Investigated Materials

Abstract

The analytical cell with planar interdigitated electrodes used for impedance measurement is considered. To estimate the influence of electrolyte conductivity on the impedance of the cell, the analytical approach is proposed. This approach uses an equivalent electrical circuit of the cell to consider the electrochemical processes in that. To determine the cell constant the analytical modeling of the potential distribution in the interdigitated microelectrode system is used. The influence of the electrolyte conductivity on the real and imaginary parts of the electrochemical cell impedance and on the sensitivity of these parameters is established.