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A Novel Instrumentation Circuit for Electrochemical Measurements
Department of Optometry, Chung Hwa University of Medical Technology, Tainan 717, Taiwan
Department of Electronic Engineering, National Kaohsiung University of Applied Science, Kaohsiung 807, Taiwan
General Education Center, Chung Hwa University of Medical Technology, Tainan 717, Taiwan
* Author to whom correspondence should be addressed.
Received: 27 April 2012; in revised form: 9 June 2012 / Accepted: 9 July 2012 / Published: 17 July 2012
Abstract: 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.
Keywords: instrumentation; biosensor; electrochemical measurement; multi-purpose
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Yin, L.-T.; Wang, H.-Y.; Lin, Y.-C.; Huang, W.-C. A Novel Instrumentation Circuit for Electrochemical Measurements. Sensors 2012, 12, 9687-9696.
Yin L-T, Wang H-Y, Lin Y-C, Huang W-C. A Novel Instrumentation Circuit for Electrochemical Measurements. Sensors. 2012; 12(7):9687-9696.
Yin, Li-Te; Wang, Hung-Yu; Lin, Yang-Chiuan; Huang, Wen-Chung. 2012. "A Novel Instrumentation Circuit for Electrochemical Measurements." Sensors 12, no. 7: 9687-9696.