Unpredictable baseline drift and sensitivity degradation during continuous use are two of the most significant problems of biosensors including the amperometric glucose and lactate sensors. Therefore, the capability of on-demand in situ calibration/diagnosis of biochemical sensors is indispensable for reliable long-term monitoring with minimum attendance. Another limitation of oxidase enzyme-based biosensors is the dependence of enzyme activity on the background oxygen concentration in sample solution. In order to address these issues, the electrolytic generation of oxygen and hydrogen bubbles were utilized 1) to overcome the background oxygen dependence of glucose and lactate sensors and 2) to demonstrate the feasibility of in situ self-calibration of the proposed glucose and lactate sensors. Experimental data assure that the proposed techniques effectively establish the zero calibration value and significantly improve the measurement sensitivity and dynamic range in both glucose and lactate sensors.
J. Park et al., "Oxidase-Coupled Amperometric Glucose and Lactate Sensors with Integrated Electrochemical Actuation System," IEEE Transactions on Instrumentation and Measurement, vol. 55, no. 4, pp. 1348-1355, Institute of Electrical and Electronics Engineers (IEEE), Aug 2006.
The definitive version is available at http://dx.doi.org/10.1109/TIM.2006.876396
Electrical and Computer Engineering
National Science Foundation (U.S.)
University of Missouri--Rolla. Intelligent Systems Center
Keywords and Phrases
Actuator; Amperometric Sensors; Baseline Drift; Biosensors; Calibration; Electrochemical Actuation System; Electrolytic Generation; Enzyme Activity; Enzymes; Glucose Oxidase (GOD); Lactate Oxidase (LOD); Oxidase Enzyme; Sensitivity; Sensitivity Degradation; Sensors Diagnosis; Solid-State Biosensor; Sugar; Thin-Film Amperometric Sensor; Water Electrolysis
International Standard Serial Number (ISSN)
Article - Journal
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