BEHAVIOR OF ELECTRODE-ELECTROLYTE INTERFACE IN BIPOLAR AND TETRAPOLAR CONCENTRIC AXIAL ELECTRODES

J. A. GÓMEZ SÁNCHEZ, W. ARISTIZABAL BOTERO, R. E. MADRID, C. J. FELICE

Graz

Congreso; ICEBI `07, 13th International Conference on Electrical Bioimpedance & 8th Conference on Electrical Impedance Tomography; 2007

In this paper we analyze the behavior of Electrode Electrolyte Interface (EEI) in bipolar and tetrapolar concentric axial electrodes build in stainless steel AISI 304. The electrical properties has been measured using a Frequency Response Analyzer (FRA) Solartron 1260 within of a frequency range of 0,1 Hz y 1 MHz in different concentrations of saline solution. A circuit model based in Constant Element Phase (CPE) has been employed to simulate the bulk electrolyte and electrode interface. The Bode and Argand plots show that the polarization resistance of interface decreasing before 1 kHz. Our study shows the advantage of use in the future of the tetrapolar concentric axial electrodes as good impedance measurement system due the reducing of IEE in low frequency.