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Type: Journal article
Title: Influence of partial dealcoholization on the composition and sensory properties of Cabernet Sauvignon wines
Author: Pham, D.
Ristic, R.
Stockdale, V.J.
Jeffery, D.W.
Tuke, S.
Wilkinson, K.
Citation: Food Chemistry, 2020; 325:126869-1-126869-8
Publisher: Elsevier
Issue Date: 2020
ISSN: 0308-8146
Statement of
Duc-Truc Pham, Renata Ristic, Vanessa J. Stockdale, David W. Jeffery, Jonathan Tuke, Kerry Wilkinson
Abstract: Worldwide, winemakers are increasingly adopting alcohol management strategies to counter the higher wine ethanol concentrations observed over the past ~30 years. Wines with high ethanol levels exhibit increased 'hotness' on the palate, which is generally considered to negatively impact wine quality. This study investigated changes in the chemical and sensory profiles of five Cabernet Sauvignon wines following their partial dealcoholization by reverse osmosis-evaporative perstraction (RO-EP). Descriptive analysis (DA) of wine before and after RO-EP treatment indicated dealcoholization did not strongly affect wine aroma and flavor, consistent with the small changes observed in wine chemical composition. However, significant differences in the perception of wine palate attributes were observed, with dealcoholized wines found to exhibit lower acidity, sweetness, bitterness, saltiness and/or body. Astringency was enhanced following partial dealcoholization of one wine, but diminished in another. Sensory trials were also undertaken to determine the optimal ethanol concentration of wines, or the 'alcohol sweetspot'. Two approaches to alcohol sweetspotting of dealcoholized wines were evaluated, together with two methods of statistical analysis, chi-squared goodness of fit and one proportion tests.
Keywords: Alcohol sweetspot; descriptive analysis; evaporative perstraction; reverse osmosis; reduced alcohold wine
Rights: © 2020 Elsevier Ltd. All rights reserved.
DOI: 10.1016/j.foodchem.2020.126869
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