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Title: A thick-film sensor as a novel device for determination of polyphenols and their antioxidant capacity in white wine
Authors: Kanokorn Photinon
Yongyuth Chalermchart
Chartchai Khanongnuch
Shih Han Wang
Chung Chiun Liu
Keywords: Biochemistry, Genetics and Molecular Biology
Physics and Astronomy
Issue Date: 1-Mar-2010
Abstract: A thick-film electrochemical sensor with an iridium-carbon working electrode was used for determining polyphenols and their antioxidant capacity in white wine. Caffeic acid was used as a model species because it has the ability to produce the highest oxidation current. The correlation coefficient of 0.9975 was obtained between sensor response and caffeic acid content. The total phenolic content (TPC) and scavenging activity on 1,1-diphenyl-2-pycrylhydrazyl (DPPH·) radical were also found to be strongly correlated with the concentration of caffeic acid, with a correlation coefficient of 0.9823 and 0.9958, respectively. The sensor prototype was proven to be a simple, efficient and cost effective device to evaluate the antioxidant capacity of substances. © 2010 by the authors.
ISSN: 14248220
Appears in Collections:CMUL: Journal Articles

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