Prof. Mark A. Tapsak Profile

Prof. Mark A. Tapsak

at Bloomsburg Univ

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Proceedings Article | 25 September 2007 Paper

Improved electrochemical biosensor response via metal oxide pre-oxidation of chemical interferents

Jamie Houseknecht, Mark Tapsak

Proceedings Volume 6769, 67690I (2007) https://doi.org/10.1117/12.752637

KEYWORDS: Biosensors, Sensors, Glucose, Oxides, Hydrogen, Metals, Electrodes, Magnesium, Blood, Oxygen

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Typical biological samples are inherently complicated. They may contain a myriad of compounds that are electroactive at the same potential as that used in many electrochemical biosensors. Therefore, a biosensor design feature must be included that either eliminates or blocks the interferents from generating false positive signals. The ability to use an insoluble compound, that of MnO₂, in order to oxidize interferents such as ascorbic acid, acetaminophen and uric acid, was investigated in a prototype sensor system at a bias potential of 0.6 V versus Ag/AgCl. Unlike previous work with these materials, a difference between the ability for the metal oxide to oxidize the interferents was observed. Most effective was the capability of MnO₂ to oxidize uric acid. Alternatively, the MnO₂ had little effect on acetaminophen. The study is both introduced and results are discussed within the context of an implantable glucose sensor.

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