IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 New understanding on sulfites reactivity in wine

New understanding on sulfites reactivity in wine

Abstract

Sulfur dioxide is widely used during winemaking as an antioxidant and antimicrobial agent. Bisulfite (HSO3−), the predominant form of SO2 at wine pH, reacts with several wine components forming sulfonated adducts. Up to now, the compounds that react with SO2 are categorized into strong and weak binders, depending on the stability of the sulfonated adducts that they produce, meaning that compared to the strong binders, weak binders release easily SO2, and under oxidation conditions, they become a pool of free SO2 that will contribute later to wine’s oxidative stability. Carbonyl compounds have been well studied regarding their reaction with SO2, in contrast to peptides and sulfur containing compounds. In this work, 1H NMR spectroscopy has been used in order to monitor directly under wine-like acidic conditions, the kinetics of sulfonation reactions of carbonyls (acetaldehyde and pyruvic acid) and sulfur containing compounds (cysteine and glutathione) with different ratios of SO2 in aerobic and anaerobic conditions. These simulations of wine aging have shown first, that during aging sulfonation reactions to strong carbonyl binders are reversible inducing a decrease on total SO2 level. The dissociation of carbonyls from sulfites is occurred under all conditions. Second, thiol containing compounds appeared to play the key role as metabolic SO2 sink at the late stages of bottle aging. These, until now, unconsidered SO2 binders appeared stables under wine oxidation conditions and represent the truly waste fraction of sulfites during aging. This study puts under reconsideration the way of evaluating the strength of the SO2 binders and could possibly contribute to new strategies for SO2 management in winemaking.

DOI:

Publication date: June 23, 2022

Issue: IVAS 2022

Type: Article

Authors

Tachtalidou Sofia1, Spyros Apostolos2, Heinzmann Silke3, Sok Nicolas1, Noret Laurence1, Denat Frank4, Schmitt-Kopplin Philippe3, Gougeon Régis1 and Nikolantonaki Maria1

 1UMR PAM Université de Bourgogne/Agro Sup Dijon, Institut Universitaire de la Vigne et du Vin, Jules Guyot, 2 Rue Claude Ladrey, 21000, Dijon, France
2NMR Laboratory, Department of Chemistry, University of Crete, P.O. Box 2208, Voutes Campus, 71003, Heraklion, Crete, Greece
4Institut de Chimie Moléculaire de l’Université de Bourgogne, UMR 6302, CNRS, Université Bourgogne Franche-Comté, 21078 Dijon, France

Contact the author

Keywords

sulfur dioxide, acetaldehyde, glutathione, wine, oxidation

Tags

IVAS 2022 | IVES Conference Series

Citation

Related articles…

Tokaj zonation, traditions and future prospects

La superficie actuelle de l’ensemble des vignobles est de 5.293 ha qui est repartie dans 27 communes (données officielles du Conseil National des Communes de montagnes).

Read More

Wine industry, digital transformation, and sustainability: a systematic literature 

This paper aims to (i) identify the state of the art regarding digital transformation in the transition to sustainability in the wine industry, (ii) analyze the adoption of digital technologies at different stages of the winemaking process and their contribution to the triple bottom line of sustainability, and (iii) present a research agenda that facilitates the development of the field, providing contributions to both literature and managerial practice.

Read More

Polysaccharide families of lyophilized extracts obtained from unfermented varietal grape pomaces

The recovery of bioactive compounds from grape and wine by-products is currently an important objective for revaluation and sustainability. Grape pomace is one of the main by-products and is a rich source of some bioactive compounds. The aim of this study was to evaluate the polysaccharide (PS) composition of extracts obtained from pomaces of different white and red grape varieties of Castilla y León. Grape pomaces were obtained after the pressing in the winemaking process.

Read More

Distribution and associated symptoms of grapevine trunk pathogens in South Africa

In recent studies, several grapevine trunk pathogen complexes have been identified from grapevines in South Africa. These pathogens include Eutypa lata, Phaeomoniella chlamydospora, Phaeoacremonium sp., Botryosphaeria sp. and Phomopsis sp. Trunk diseases lead to reduced yield, and grape quality as well as a decline

Read More

Monitoring vineyard canopy structure by aerial and ground-based RGB and multispectral imagery analysis

Unmanned Aerial Vehicles (UAVs) are increasingly used to monitor canopy structure and vineyard performance. Compared with traditional remote sensing platforms (e.g. aircraft and satellite), UAVs offer a higher operational flexibility and can acquire ultra-high resolution images in formats such as true color red, green and blue (RGB) and multispectral. Using photogrammetry, 3D vineyard models and normalized difference vegetation index (NDVI) maps can be created from UAV images and used to study the structure and health of grapevine canopies. However, there is a lack of comparison between UAV-based images and ground-based measurements, such as leaf area index (LAI) and canopy porosity.

Read More