Evolution of sulfonated tannins in red wines with ageing: A targeted metabolomic approach.

Autor: Devi A; Department of Viticulture and Enology, University of California, Davis, CA 95616, United States of America. Electronic address: aprdevi@ucdavis.edu., Harbertson JF; Department of Viticulture and Enology, Washington State University, Richland, WA 99352, United States of America. Electronic address: jfharbertson@wsu.edu., Waterhouse AL; Department of Viticulture and Enology, University of California, Davis, CA 95616, United States of America. Electronic address: alwaterhouse@ucdavis.edu.
Jazyk: angličtina
Zdroj: Food chemistry [Food Chem] 2024 Nov 19; Vol. 465 (Pt 2), pp. 142138. Date of Electronic Publication: 2024 Nov 19.
DOI: 10.1016/j.foodchem.2024.142138
Abstrakt: During wine ageing, tannins could react with sulfur dioxide to form sulfonated flavanols which are anticipated to alter tannin binding to proteins contributing to the reduction of astringency during ageing. Previous studies have identified or quantified monomeric and dimeric sulfonated flavanols in aged wines, but the evolution of sulfonated tannins has been lacking. Here, we quantified sulfonated tannins in three Washington state vineyards over a 20-year period, employing targeted LC-QToF analysis. Analysis of 24 wines revealed a systematic trajectory of sulfonated tannins over 20 years. Sulfonated monomers rose consistently with wine age, becoming the dominant form of sulfonated products in all samples at the 20-year mark. Concurrently, there was a decline in native tannins and sulfonated oligomers, suggesting a process of acid-catalyzed depolymerization of native tannins followed by sulfonation via reaction with sulfur dioxide. Future work is needed to understand the stability of sulfonated tannins and their impact on wine astringency.
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Apramita Devi reports financial support was provided by Washington State Wine Commission. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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