In this paper, a novel signal processing circuit which can be used for the measurement of H + ion and urea concentration is presented. A potentiometric method is used to detect the concentrations of H + ions and urea by using H + ion-selective electrodes and urea electrodes, respectively. The experimental data shows that this measuring structure has a linear pH response for the concentration range within pH 2 and 12, and the dynamic range for urea concentration measurement is in the range of 0.25 to 64 mg/dL. The designed instrumentation circuit possesses a calibration function and it can be applied to different sensing electrodes for electrochemical analysis. It possesses the advantageous properties of being multi-purpose, easy calibration and low cost. © 2012 by the authors; licensee MDPI, Basel, Switzerland.
Yin, L. T., Wang, H. Y., Lin, Y. C., & Huang, W. C. (2012). A novel instrumentation circuit for electrochemical measurements. Sensors (Switzerland), 12(7), 9687–9696. https://doi.org/10.3390/s120709687