VitiSynth Full Entry

Reference: Impact of Grape Temperature at Pressing on Organic Acids and Oenological Characteristics of Methode Cap Classique Wines
Key Statements


Maintaining the chemical composition of a wine is essential for the wine industry. Although the sugar-acid balance of a wine is of primary sensory importance, individual acids and oenological parameters are equally important. The main focus of this study was to investigate the impact of grape temperature at harvest, on the oenological volatile acidity (VA), titratable acidity (TA), pH and alcohol levels and organic acid (citric, malic, pyruvic and succinic) characteristics of Méthode Cap Classique (MCC) wines during winemaking, produced from grape cultivars obtained from two regions. Chardonnay and Pinot noir grapes were obtained from Robertson (warmer) and Elgin (cooler) regions and were subjected to different temperature treatments, i.e. 0, 10, 25 and 30oC before further processing, including pressing, primary fermentation, blending, tirage, secondary fermentation, riddling and disgorging. Grape temperature was mostly responsible for a significantly higher pH of Robertson (0 and 10ºC) and lower pH (0ºC) of Elgin post-tirage wines. Chardonnay base wines from both regions that were vinified from grapes at lower temperatures (0 and 10oC)  were richer in malic- and succinic acid, while Pinot noir wines from both regions were characterised by higher malic-, citric- and pyruvic acid. Pyruvic acid was only detected after the secondary fermentations in wines from both regions. To our knowledge, this study is the first to investigate the influence of grape temperature on the oenological and organic acid characteristics of MCC wines in different regions, and throughout different production stages.

(highlighting by VitiSynth)

Link to paper-

Partially indexed reference.

View Interactions

VitiSynth Review
Go Back


Publication Details

Published: 2018
Publication: SAJEV
Issue: 2018 39-1
Author: Chidi B S 2018


Related Video

None for this Entry

Related Audio

None for this Entry

Discuss this Entry

No related discussions available.

Join Discussion

Latest Discussions
Special Report

Date: 29th October 2015
Reference:Journal:Weed Technology:2015:Online October 2015:Devkota P 2015:Influence of Spray Solution Temperature and Holding Duration on Weed Control with Premixed Glyphosate and Dicamba Formulation

Pesticides in general are chemical products, therefore the quality of ...Read more

Date: 3rd February 2015
Polls:0009:Data standards:03 Malvidin-3-glucoside or Malvidin-3-O-glucoside or Malvidin 3-O-β-D-glucoside?

Malvidin-3-glucoside or Malvidin-3-O-glucoside or Malvidin 3-O-β-D-gl...Read more

Date: 26th January 2015
Admin Synth:Guides:Data standards:Wine industry research papers (draft standard)

I think we should be developing a standard for wine industry research ...Read more

Testimonials.. Read more