title: A novel instrumentation circuit for electrochemical measurements.
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.
authors.affiliation: Department of Optometry, Chung Hwa University of Medical Technology, Tainan 717, Taiwan. leaderyin@gmail.com
authors.forename: Li-Te
authors.initials: LT
authors.lastname: Yin
authors.forename: Hung-Yu
authors.initials: HY
authors.lastname: Wang
authors.forename: Yang-Chiuan
authors.initials: YC
authors.lastname: Lin
authors.forename: Wen-Chung
authors.initials: WC
authors.lastname: Huang