italianoenglishfrançaisdeutschespañolportuguês
Language
Search
  • » Vine Physiology
  • » A novel electrochemical approach for rapid analysis of white grapes polyphenols and monitoring of pre-fermentative operations

A novel electrochemical approach for rapid analysis of white grapes polyphenols and monitoring of pre-fermentative operations

M. UGLIANO, J. WIRTH, S. BÉGRAND, J. B. DIÉVAL, C. PASCAL, S. VIDAL; Università degli Studi di Verona - Vinventions, Francia

The ability to rapidly quantify and characterize phenolic composition of grapes and must is critical in the optimization of winemaking practices.

In the case of white wine production, measurement of phenolics in the grapes would allow to tailor more precisely winemaking strategies, with the final aim of obtaining wine with improved aroma and color stability. For example, pressing, oxidation during must preparation, fining and skin contact could be adapted to the actual phenolic composition of individual grapes batches. At the same time, it is also important to have analytical procedures that can be easily applied in the winery.

An electrochemical method for the rapid analysis of phenolic compounds of grapes and must was developed. The method is based on the use of miniaturized disposable electrodes, allowing a fast and versatile application in the laboratory and in the winery.

Total and easily oxidized phenolics can be measured separately. The method was used to characterize the phenolic profile of different grape varieties and their evolution during the controlled oxygenation of musts. The extraction of phenolic compounds during prefermentative skin contact can also be followed.

The technique allows a better adaptation of winemaking practices to the composition of grapes and management of pre-fermentation steps that are key to white winemaking.

Published on 02/05/2019
Pictures
Item available in italiano francais
Related sheets
    E. Aguera, J.M. Sablayrolles
    The seasonal character of harvests limits winemaking considerably, especially oenological research. Thus, conserving sterile musts during the whole year to carry out experiments is certainly a very...
    Published on:10/08/2005
    Stability of SO2: recent observations and practical implications
    Maurizio Ugliano, Università di Verona; Elisa Martelli, Vinventions
    The oxygen present in the bottle is the set of different factors: dissolved oxygen, head space and oxygen that permeates through the cap. These factors determine the variability and the keeping of ...
    Published on:12/07/2018
    A new device for stabilisation of white wines throughout a continous flow system
    Parpinello, G.P., Ricci, A., Serantoni, M., Balducci, A., Ragni, L., Versari, A.; University of Bologna, Italy
    Proteins occurring in wine originate from several sources during the winemaking process. Protein content in wines ranges from traces up to hundreds of mg/L, and may cause physical instability in wh...
    Published on:15/01/2020
    An electrochemical method for real time measurement of polyphenols during winemaking
    By Christine Pascal, Nelly Champeau, Jean Baptiste Diéval, Stéphane Vidal; Vinventions, Enology team, France
    Polyphenols are known to play a major role in must oxidation as well as in wine aging and oxidation. However, they are difficult to measure in the cellar due to lack of adequate technology. Therefo...
    Published on:03/02/2020
    Application of visible/near infrared spectroscopy to assess the grape infection at the winery
    A. Tugnolo, V.Giovenzana, R. Beghi, L. Brancadoro, R. Guidetti; DiSAA, Università degli Studi di Milano, Italy
    The aim of this work was to investigate the applicability of vis/NIR spectroscopy for rapid grape infection assessment in a view of a grape classification directly at the check point station enteri...
    Published on:09/10/2018
    Most popular practices in Europe against FD
    Results of interviews in 10 winegrowing regions
    This document illustrate practices observed on field in the famework of interviews realized during Winetwork project. 219 interviews were realized in 10 european winegrowing regions with the object...
    Published on:06/12/2016
© All Right Reserved
ISSN 1826-1590 VAT: IT01286830334
powered by Infonet Srl Piacenza
Privacy Policy
This website and its related third-party services make use of cookies necessary for the purposes described in the cookie policy. If you want to learn more about cookies or how to disable them (either totally or partially), please see the cookie policy. By closing this banner, scrolling through this page, clicking on a link or continuing navigation in any other way, you consent to the use of cookies.
More informationOK

- A +
ExecTime : 3,154297