Impedance analysis for medical and electrochemical applications using a low cost instrumentation

Abstract

This paper presents a low cost instrumentation that is able to perform impedance analysis and the estimation of the electrode-electrolyte parameters through frequency sweep. The proposed system allows identifyying the resistances and capacitance of the electrode-electrolyte equivalent model, where only voltage measurements are performed. Due to its flexible design, the system can be easily addapted to different applications and experimental requirements. Results show remarkable fair accuracy, considering the much lower price, smaller sizes and flexibility of use of the developed system.