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Molecules 2019, 24(2), 234; https://doi.org/10.3390/molecules24020234

A Time-Resolved Study on the Reactivity of Alcoholic Drinks with the Hydroxyl Radical

Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas, Avda. de los Naranjos s/n, E-46022 Valencia, Spain
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Received: 2 December 2018 / Revised: 28 December 2018 / Accepted: 7 January 2019 / Published: 10 January 2019
(This article belongs to the Section Photochemistry)
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Abstract

Reactive oxygen species (ROS) can provoke damage to cells, where their concentrations are regulated by antioxidants. As the hydroxyl radical (•OH) is the most oxidizing ROS, we have focused our attention on the use of a mechanistically based time-resolved methodology, such as laser flash photolysis, to determine the relative reactivity of alcoholic beverages towards •OH as an indicator of their antioxidant potential. The selected drinks were of two different origins: (i) those derived from grapes such as red wine, white wine, white vermouth, marc and brandy and (ii) spirits not derived from grapes: triple sec, gin, whisky, and rum. Initially, we determined the quenching rate constant of ethanol with •OH and then we explored the reactivity of the different beverages, which was higher than expected based on their alcoholic content. This can be attributed to the presence of antioxidants and was especially remarkable for the grape-derived drinks. View Full-Text
Keywords: antioxidants; laser flash photolysis; spirits; transient absorption; wine antioxidants; laser flash photolysis; spirits; transient absorption; wine
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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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Rodriguez-Muñiz, G.M.; Miranda, M.A.; Marin, M.L. A Time-Resolved Study on the Reactivity of Alcoholic Drinks with the Hydroxyl Radical. Molecules 2019, 24, 234.

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