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Molecules 2016, 21(9), 1154;

Development and Validation of a Kit to Measure Drink Antioxidant Capacity Using a Novel Colorimeter

Department of Biochemistry and Biotechnology, University of Thessaly, Larissa 41221, Greece
Polytech S.A., Larissa 41222, Greece
Coffee Island S.A., Patras 26334, Greece
Department of Agricultural Engineering Technologists, TEI of Thessaly, Larissa 41110, Greece
Department of Forensic Sciences and Toxicology, Medical School, University of Crete, Heraklion 71003, Greece
Author to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Received: 13 July 2016 / Revised: 26 August 2016 / Accepted: 27 August 2016 / Published: 30 August 2016
(This article belongs to the Section Natural Products Chemistry)
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Measuring the antioxidant capacity of foods is essential, as a means of quality control to ensure that the final product reaching the consumer will be of high standards. Despite the already existing assays with which the antioxidant activity is estimated, new, faster and low cost methods are always sought. Therefore, we have developed a novel colorimeter and combined it with a slightly modified DPPH assay, thus creating a kit that can assess the antioxidant capacity of liquids (e.g., different types of coffee, beer, wine, juices) in a quite fast and low cost manner. The accuracy of the colorimeter was ensured by comparing it to a fully validated Hitachi U-1900 spectrophotometer, and a coefficient was calculated to eliminate the observed differences. In addition, a new, user friendly software was developed, in order to render the procedure as easy as possible, while allowing a central monitoring of the obtained results. Overall, a novel kit was developed, with which the antioxidant activity of liquids can be measured, firstly to ensure their quality and secondly to assess the amount of antioxidants consumed with the respective food. View Full-Text
Keywords: kit; antioxidant; quality control; DPPH; colorimeter; drink; beverage kit; antioxidant; quality control; DPPH; colorimeter; drink; beverage

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Priftis, A.; Stagos, D.; Tzioumakis, N.; Konstantinopoulos, K.; Patouna, A.; Papadopoulos, G.E.; Tsatsakis, A.; Kouretas, D. Development and Validation of a Kit to Measure Drink Antioxidant Capacity Using a Novel Colorimeter. Molecules 2016, 21, 1154.

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