terclim by ICS banner
IVES 9 IVES Conference Series 9 EXTRACTIBLE COMPOUNDS FROM MICROAGGLOMERATED CORK STOPPERS

EXTRACTIBLE COMPOUNDS FROM MICROAGGLOMERATED CORK STOPPERS

Abstract

After bottling, the wine continues to evolve during storage. The choice of the stopper is an important factor in this evolution. In addition to the oxygen permeability of the closure, the migration of stopper compounds into the wine can also have an impact on the wine organoleptic properties. Many studies have shown that transfers of volatile compounds from the stoppers into the wine can happen depending on the type of closure used (1). Moreover, when cork-made stoppers are used, the migration of phenolic compounds from the stopper into the wine can also occur (2, 3). However, there are few studies on the migration of polyphenols from agglomerated corks treated with supercritical CO₂. Therefore, the present study aimed to quantify the polyphenols released by microagglomerated cork stoppers in hydroalcoholic solutions in comparison with those extracted from natural cork stoppers. Thus, extractions were performed on eight different batches of natural cork stoppers and eleven of microagglomerated cork stoppers treated with supercritical CO₂. For this, six stoppers from each batch were immersed in 400 mL of 12% ethanol solution at 40°C for 10 days. The nineteen macerates were then analyzed by HPLC-DAD-ESI-QQQ to identify and quantify the extracted polyphenols and suberic acid. The microagglomerated corks released significantly fewer polyphenols (i.e., 25 times less). Regarding suberic acid, no differences were observed between both types of cork stoppers. Then, according to the groups obtained by a hierarchical ascending classification based on polyphenol composition, the macerates were pooled in equal volumes to reconstitute four new macerates of natural and/or microagglomerated cork stoppers. These four samples were then submitted to a panel of thirteen judges to perform a sensory profile with olfacto-ry, taste, and mouthfeel descriptors. The results of this sensory profile showed that microagglomerated stoppers appeared to have the lowest overall impact on the olfactory and gustative perception of the hydroalcoholic solutions.

 

1. Culleré, L., Cacho, J., & Ferreira, V. (2009). Comparative study of the aromatic profile of different kinds of wine cork stoppers. Food chemistry, 112(2), 381-387.
2. Azevedo, J., Fernandes, I., Lopes, P., Roseira, I., Cabral, M., Mateus, N., & Freitas, V. (2014). Migration of phenolic compounds from different cork stoppers to wine model solutions : Antioxidant and biological relevance. European Food Research and Technology, 239(6), 951-960.
3. Reis, S. F., Coelho, E., Evtuguin, D. V., Coimbra, M. A., Lopes, P., Cabral, M., Mateus, N., & Freitas, V. (2020). Migration of Tannins and Pectic Polysaccharides from natural cork stoppers to the hydroalcoholic solution. Journal of Agricultural and Food Chemistry, 68(48), 14230-14242.

DOI:

Publication date: February 9, 2024

Issue: OENO Macrowine 2023

Type: Poster

Authors

Anne-Laure Gancel¹, Michaël Jourdes¹, Alexandre Pons1, 2 and Pierre-Louis Teissedre1*

1. Université de Bordeaux, Bordeaux INP, Bordeaux Sciences Agro, UMR 1366 OENOLOGIE, ISVV, 33140 Villenave d’Ornon
2. Tonnellerie Seguin-Moreau, ZI Merpins, 16103, Cognac, France

Contact the author*

Keywords

wine cork stoppers, polyphenols, suberic acid, sensory analysis

Tags

IVES Conference Series | oeno macrowine 2023 | oeno-macrowine

Citation

Related articles…

A NEW STRATEGY AND METHODOLOGY FOR THE CHARACTERIZATION OF POLYPHENOLS IN FINING PRECIPITATE

Polyphenols are secondary metabolite widely distributed in plant kingdom such as in fruits, in grapes and in wine. During the winemaking process, polyphenols are extract from the skin and seed of the berries. Fining is an important winemaking step just before bottling which has an impact on wine stabilization and clarification. Most the time, fining agent are animal or vegetal protein while some of them can be synthetic polymer like PVPP or natural origin like bentonite.

Read More

SENSORY IMPROVEMENT OF DEALCOHOLISED WINES

Interest and willing-ness to buy alcohol-free wines by customers is increasing for several years [1]. Due to the rising relevance of dealcoholised wines it is the objective of this study to contribute to a better understanding of the flavor variation among dealcoholised wines and to explore enological measures, how to improve final quality.
First a range of commercial, alcoholfree white wines were analysed by the holistic sensory method projective mapping, including a question for hedonic acceptance. Based on the combination of a non-target-HS-SPME-GC/MS analysis with sensory analysis we obtained a clustering of the wines into three groups.

Read More

DISCRIMINATION OF BOTRYTIS CINEREA INFECTED GRAPES USING UNTARGE-TED METABOLOMIC ANALYSIS WITH DIRECT ELECTROSPRAY IONISATION MASS SPECTROMETRY

Infection of grapes (Vitis vinifera) by Botrytis cinerea (grey mould) is a frequent occurrence in vineyards and during prolonged wet and humid conditions can lead to significant detrimental impact on yield and overall quality. Growth of B. cinerea causes oxidisation of phenolic compounds resulting in a loss of colour and formation of a suite of off-flavours and odours in wine made from excessively infected fruit. Apart from wine grapes, developing post-harvest B. cinerea infection in high-value horticultural products during storage, shipment and marketing may cause significant loss in fresh fruits, vegetables and other crops. A rapid and sensitive assessment method to detect, screen and quantify fungal infection would greatly assist viticultural growers and winemakers in determining fruit quality.

Read More

PROBING GRAPEVINE-BOTRYTIS CINEREA INTERACTION THROUGH MASS SPECTROMETRY IMAGING

Plants in their natural environment are in continuous interaction with large numbers of potentially pathogenic and beneficial microorganisms. Depending on the microbe, plants have evolved a variety of resistance mechanisms that can be constitutively expressed or induced. Phytoalexins, which are biocidal compounds of low to medium molecular weight synthesized by and accumulated in plants as a response to stress, take part in this intricate defense system.1,2
One of the limitations of our knowledge of phytoalexins is the difficulty of analyzing their spatial responsiveness occurring during plant- pathogen interactions under natural conditions.

Read More

FOURIER TRANSFORM INFRARED SPECTROSCOPY IN MONITORING THE WINE PRODUCTION

The complexity of the wine matrix makes the monitoring of the winemaking process crucial. Fourier Transform Infrared Spectroscopy (FTIR) along with chemometrics is considered an effective analytical tool combining good accuracy, robustness, high sample throughput, and “green character”. Portable and non-portable FTIR devices are already used by the wine industry for routine analysis. However, the analytical calibrations need to be enriched, and some others are still waiting to be thoroughly developed.

Read More