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Chemiluminescent Ethanol Biosensor Development
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English
Abstract
The investigation and development of a chemiluminescence based ethanol detection concept into a biosensor system is described. The biosensor uses alcohol oxidase to catalyze the reaction of short chain primary alcohols with elemental oxygen to produce hydrogen peroxide and the corresponding aldehyde. The reaction of hydrogen peroxide with an organic luminophore in the presence of a sufficient electric field results in emission of blue light with peak intensity at 425nm. The chemiluminescent light intensity is directly proportional to the alcohol concentration of the sample. The aqueous phase chemistry required for sensor operation is implemented using solid phase modules which adjust the pH of the influent stream, catalyze the oxidation of alcohol, provide the controlled addition of the luminophore to the flowing aqueous stream, and minimize the requirement for expendables. Precise control of the pH has proven essential for the long-term sustained release of the luminophore. Electrocatalysis is achieved using a controlled potential across gold mesh and gold foil electrodes which undergo periodic polarity reversals. Ethanol concentrations (as C) in the range between 40 and 4,000μg/L have been determined. The performance features of this sensor are presented in this paper.
Authors
Citation
Atwater, J., Akse, J., DeHart, J., Wheeler, R. et al., "Chemiluminescent Ethanol Biosensor Development," SAE Technical Paper 951686, 1995, https://doi.org/10.4271/951686.Also In
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