Macrowine 2021
IVES 9 IVES Conference Series 9 Development of a strategy for measuring fruity aroma potential in red wine

Development of a strategy for measuring fruity aroma potential in red wine

Abstract

AIM: Levels of esters derived from substituted acids increase during the first years of aging and some of them are strongly involved in red wine fruity aromatic expression. Considering such a role, the analysis of their precursors remains indispensable. The goal of this research was to develop a method to level substituted acids, including their enantiomeric forms.

METHODS: Substituted esters and acids were analyzed by GC-MS. The development and optimization of hydroxycarboxylic acid quantitation and enantiomeric separation method consisted of: ester elimination of wine sample, acid extraction, derivatization, extraction and analysis of derivative methyl esters by GC-MS, using a Chiraldex G-TA column. The quantitation and enantiomeric distribution of substituted esters and acids were established in 31 commercial Bordeaux red wines.

RESULTS: Quantitation and enantiomeric distribution of esters and acids showed a strong positive correlation between the age of wine and levels of substituted esters and only a few correlations between acid enantiomers concentrations and age: e.g the decrease in (2R)-2-hydroxy-4-methylpentanoic acid concentration over time, for at least 20 years, may be due to esterification, leading to the increase of the corresponding ester. Variations in the ratio of substituted ethyl esters to their corresponding acids over time detected thanks to these analytical advances suggested that, in general, acids were continuously esterified during aging.

CONCLUSIONS

An assessment of the overall “aromatic potential” of these esters involved in red wine fruity aroma enhancement may be predicted, thanks to the development of the quantitation method of the corresponding acids.

DOI:

Publication date: September 14, 2021

Issue: Macrowine 2021

Type: Article

Authors

Georgia Lytra

Unité de recherche Œnologie, EA 4577, USC 1366 INRA, ISVV, Université de Bordeaux, F33882 Villenave d’Ornon France,CELINE FRANC MARGAUX CAMELEYRE JEAN CHRISTOPHE BARBE  Unité de recherche Œnologie, EA 4577, USC 1366 INRA, ISVV, Université de Bordeaux, F33882 Villenave d’Ornon France

Contact the author

Keywords

fruity aroma, red wine, substituted esters and acids, precursors

Citation

Related articles…

Il piano regolatore delle citta’ del vino

Obiettivo generale di questo documenta è fornire un metodo di pianificazione che superi l’organizzazione delle aree rurali, ed in particolare vitate, finalizzata unicamente all’ot­timizzazione economico produttiva delle aziende, verso una pianificazione integrata degli spazi aperti.

Methodological advances in relating deep root activity to whole vine physiology

Full understanding of grapevine responses to variable soil resources requires
assessing the grapevine root system. Grapevine root systems are expansive and examining deep roots (i.e., >40 cm)
is particularly important in conditions where grapevines increase reliance on deep soil resources, such as drought
or plant competition. Traditional methods of assessing roots rely on morphological traits associated specific
functions (e.g., root color, diameter, length), while recent methodological advances allow for estimating root
function more directly (e.g., omics). Yet, the potential of applying refined methods remains underexplored for roots
at deep depths.

The revision of the delimitation of the AOC “Champagne”

The Champagne vine-growing region has played a pioneering role in the delimitation of appellations of origin (AOC). The implementation of the Act of July, 22nd 1927 has led to drawing up lists of vine plots based on the criterion of vine cultivation antecedence.

The relationship of wine store customers with the areas of production, considering provenance and tourism

This work aims at identifying the most appropriate marketing strategies to inform consumers of the global market about the added value of the wines of Friuli Venezia Giulia.

Acceptance of fungus-resistant grape varieties from the perspective of producers and consumers in Germany

Fungus-resistant grape varieties (frgv) are an important field of research in viticulture, as they represent a way of reducing the use of copper-containing pesticides and thus minimising the environmental impact. The literature suggests that resistant grape varieties are a promising solution to the problem of using copper-containing pesticides in viticulture and that their quality has improved in recent years. However, there are still challenges in the acceptance and dissemination of FRGV by wine producers and consumers.