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Direct NMR evidence for the dissociation of sulfur-dioxide-bound acetaldehyde under acidic conditions: Impact on wines oxidative stability.
Food Chem. 373:131679 (2021)
SO2 reaction with electrophilic species present in wine, including in particular carbonyl compounds, is responsible for the reduction of its protective effect during wine aging. In the present study, direct 1H NMR profiling was used to monitor the reactivity of SO2 with acetaldehyde under wine-like oxidation conditions. The dissociation of acetaldehyde bound SO2 was evidenced suggesting that released free SO2 can further act as an antioxidant. EPR and DPPH assays showed an increasing antioxidant capacity of wine with the increase in the concentration of acetaldehyde sulfonate. The presence of acetaldehyde sulfonate in wines was correlated with the overall antioxidant activity of wines. The first evidence of acetaldehyde bound SO2 dissociation provides a completely new representation of the long-term protection efficiency of SO2 during bottle aging.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Aldehydes ; Antioxidant Activity ; Chardonnay ; Oxidation ; White Wine; Sulfite; Mechanisms; Red; Key
ISSN (print) / ISBN
0308-8146
e-ISSN
1873-7072
Journal
Food Chemistry
Quellenangaben
Volume: 373,
Article Number: 131679
Publisher
Elsevier
Publishing Place
Amsterdam [u.a.] ; Jena
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Research Unit Analytical BioGeoChemistry (BGC)
Grants
OIV
European Union through the PO FEDER-FSE Bourgogne 2014/2020 programs
Conseil Regional de Bourgogne Franche-Comte
European Union through the PO FEDER-FSE Bourgogne 2014/2020 programs
Conseil Regional de Bourgogne Franche-Comte