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Tachtalidou, S.* ; Spyros, A.* ; Sok, N.* ; Heinzmann, S.S. ; Denat, F.* ; Schmitt-Kopplin, P. ; Gougeon, R.D.* ; Nikolantonaki, M.*

1H NMR based sulfonation reaction kinetics of wine relevant thiols in comparison with known carbonyls.

Food Chem. 449:138944 (2024)
Publ. Version/Full Text DOI PMC
Open Access Gold (Paid Option)
Creative Commons Lizenzvertrag
Sulfite addition is a common tool for ensuring wines' oxidative stability via the activity of its free and weakly bound molecular fraction. As a nucleophile, bisulfite forms covalent adducts with wine's most relevant electrophiles, such as carbonyls, polyphenols, and thiols. The equilibrium in these reactions is often represented as dissociation rather than formation. Recent studies from our laboratory demonstrate, first, the acetaldehyde sulfonate dissociation, and second, the chemical stability of cysteine and epicatechin sulfonates under wine aging conditions. Thus, the objective of this study was to monitor by 1H NMR the binding specificity of known carbonyl-derived SO2 binders (acetaldehyde and pyruvic acid) in the presence of S-containing compounds (cysteine and glutathione). We report that during simulated wine aging, the sulfur dioxide that is rapidly bound to carbonyl compounds will be released and will bind to cysteine and glutathione, demonstrating the long-term sulfur dioxide binding potential of S-containing compounds. These results are meant to serve as a complement to existing literature reviews focused on molecular markers related to wines' oxidative stability and emphasize once more the importance of S-containing compounds in wine aging chemical mechanisms.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Acetaldehyde ; Chardonnay ; Glutathione ; Oxidation ; Sulfur Dioxide; Sulfite; Glutathione; Oxygen
ISSN (print) / ISBN 0308-8146
e-ISSN 1873-7072
Journal Food Chemistry
Quellenangaben Volume: 449, Issue: , Pages: , Article Number: 138944 Supplement: ,
Publisher Elsevier
Publishing Place Amsterdam [u.a.] ; Jena
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Research Unit Analytical BioGeoChemistry (BGC)
Grants
European Union (European Regional Development Fund)
Project "FoodOmicsGR_RI Comprehensive Characterization of Foods" - Operational Programme Competitiveness, Entrepreneurship and Innovation (NSRF 2014-2020)
European Union through the PO FEDER-FSE Bourgogne 2014/2020 programs
Conseil Regional de Bourgogne Franche-Comte