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Analysis of the impact of fining agents types, oenological tannins and mannoproteins and their concentrations on the phenolic composition of red wine

Ghanem, Chantal and Taillandier, Patricia and Rizk, M. and Rizk, Ziad and Nehme, Nancy and Souchard, Jean-Pierre and El Rayess, Youssef Analysis of the impact of fining agents types, oenological tannins and mannoproteins and their concentrations on the phenolic composition of red wine. (2017) LWT - Food Science and Technology, 83. 101-109. ISSN 0023-6438

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Official URL: https://doi.org/10.1016/j.lwt.2017.05.009

Abstract

This paper aimed to evaluate and analyze the effect of five fining agents, commercial tannins and mannoproteins on the pigment, color and tannins composition of a Cabernet Sauvignon red wine. The wines were analyzed 2 d after treatment and immediately after separation of sedimentation. Color was evaluated by spectrophotometry and polyphenols were analyzed by spectrophotometry and HPLC-DAD. The results showed that all treatments affected the phenolic contents of the wine. The most remarkable effects on phenolic composition were produced by bentonite and Polyvinylpolypyrrolidone (PvPP) + potassium caseinate which significantly decreased anthocyanins and tannins concentrations, respectively. The use of vegetable protein and gelatin has a less impact on the color and phenolic contents of red wines. The antioxidant activity was little affected by treatments except the addition of tannins that increased it. Principal components analysis demonstrates the importance of a low concentration of agents for high total polyphenol levels.

Item Type:Article
HAL Id:hal-01907320
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Lebanese University - LU (LEBANON)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Holy Spirit University of Kaslik - USEK (LEBANON)
Other partners > Lebanese Agricultural Research Institute - LARI (LEBANON)
Laboratory name:
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Deposited By: Loetitia MOYA
Deposited On:23 Oct 2018 08:31

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