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POLYPYRROLE GLUCOSE OXIDASE ELECTRODES: SUPPRESSION OF COOXIDIZABLE SUBSTANCES

Hämmerle, M.
Schuhmann, W.
Schmidt, H.-L.
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Issue Date
1992
Submitted date
2024-04-10
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Abstract
With a polypyrrole glucose oxidase electrode, the analyte glucose can be determined by the anodic oxidation of the enzymatically produced hydrogen peroxide (H202). Attne high potential (650 mV vs. Ag/AgCl) necessary for the detection of H20O2 other cooxidizable substances present in the sample can interfere, resulting in a signal for glucose, that is too high. In order to suppress the interference, we studied the molecular "sieve effect" (1,2,3) of the polypyrrole immobilization matrix on a platinum substrate (d=imm). Twodifferent types of enzymeelectrodes were used (Fig.1).
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Biosensors : fundamentals, technologies and applications, 111 - 114
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Book chapter
conference paper
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en
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GBF monographs ; Volume 17
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Attribution-NonCommercial-ShareAlike 4.0 International