Macrowine 2021
IVES 9 IVES Conference Series 9 Which heat test really represents the haze risk of a white Sauvignon wine ?

Which heat test really represents the haze risk of a white Sauvignon wine ?

Abstract

AIM: Different heat tests are used to predict a white wine haze risk after bottling. The most used tests are 30-60 min. at 80°C. Nevertheless, there is a lack of information about the relationship between the wine haze observed after such tests and the turbidities observed in the bottles after the storage/transport of the wines in more realistic Summer conditions (35-46°C during 3-12 days).

 METHODS: 24 Sauvignon wines (Loire Valley – France) produced during the vintages 2018 and 2019 were studied. Six heat tests were applied on during 5-30-60 min. at 80°C and during 30-60-120 min. at 50°C. The results were compared with the turbidity reached by the wines under Summer conditions (35 to 46°C, from 1 to 14 days) and representing 6 tests too. The Pearson correlation coefficients (PCC) were calculated for all of these 12 heat tests when compared two by two.

RESULTS: The turbidities of the wines subjected to Summer temperature conditions (35-43°C) were highly correlated with the turbidities developed by the Sauvignon wines after heating 30 or 60 min. at 50°C (0.980

DOI:

Publication date: September 7, 2021

Issue: Macrowine 2021

Type: Article

Authors

Marchal Richard

Laboratoire d’Œnologie, Université de Reims, Reims, France. LVBE, Université de Haute-Alsace, Colmar, France., Lecomte Marine  Laboratoire d’Œnologie, Université de Reims, Reims, France. LVBE, Université de Haute-Alsace, Colmar, France.  Salmon Thomas Laboratoire d’Œnologie, Université de Reims, Reims, France. LVBE, Université de Haute-Alsace, Colmar, France.  Robillard Bertrand Institut Oenologique de Champagne, Mardeuil, France.

Contact the author

Keywords

wine haze, heat tests, sauvignon, pearson correlations

Citation

Related articles…

Unraveling the role of grape cell wall in shaping the fermentation rate, the polyphenolic profile and quality of red wines from disease-resistant and drought-tolerant grapes in Occitanie varietal selection

Climate change and an evolving environmental and societal context call for the exploration of disease-resistant and/or drought-adapted grape varieties that meet the demands of consumers and society.

Free and bound terpene profile of recovered minority white grape varieties by GC × GC-TOFMS

Climate change presents a significant challenge for actual viticulture. In this context, recovering minority grape varieties can be a crucial strategy to ensure resilience, particularly those capable of maintaining quality and aromatic complexity under water stress.

Non-destructive his based analysis for shelf-life evaluation of table grape 

Fast, accurate, and non-destructive analytical techniques based on hyperspectral imaging (hsi) represent effective tools for food quality evaluation. A visible change in the appearance of a fresh product often negatively impacts the perceived quality from a consumer’s point of view.

Effectiveness of “curettage” and rootstock over-grafting in the control of esca

Context and purpose of the study. The grapevine domestication requested the need of pruning, which expose the vines to trunk pathogens, leading to the spread of vine trunk diseases.

Genetic study of wild grapevines in La Rioja region

Since the mid-1980s, several surveys have been carried out in La Rioja to search for populations of the sylvestris grapevine subspecies (Vitis vinifera L. subsp. sylvestris Gmelin). The banks of the Ebro River and its tributaries (Alhama, Cidacos, Leza, Iregua, Najerilla, Oja and Tirón rivers), as well as the surrounding vegetation of their valleys have been covered. So far, all the populations found are alluvial, forming part of the riparian vegetation of the Najerilla (the first reported population in La Rioja [1]), Iregua, and the vicinity of Oja valleys.