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Sensorial and Volatile Analysis of Wines Made from Partially Dehydrated Grapes - An Ontario Case Study994.11 kB
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Journal article
Sensorial and Volatile Analysis of Wines Made from Partially Dehydrated Grapes: An Ontario Case Study
Journal of Food Quality, Vol.2020, pp.1-12
2020
Abstract
Winemaking in cool climate viticultural areas can pose challenges due to difficulties in achieving optimal ripeness from climatic conditions that tend to vary vintage-to-vintage. To stabilize quality, the use of partially dehydrated grapes has been indicated as beneficial to the production of high-quality wine (“appassimento” style) despite climatic variation. Postharvest wine grape dehydration is a complex process that involves the concentration or formation of sugars, aromas, and flavours. One of the quality challenges facing appassimento style winemaking is elevated levels of undesirable oxidation compounds. The aim of this study was to characterize wines made from a local yeast isolate, Saccharomyces uvarum CN1, which demonstrates limited osmotolerance and may have application to this wine style, as it is a known lower producer of such compounds. Wines made with CN1 were compared to wines made with the accepted commercial standard, S. cerevisiae, EC1118. Fermentations (n = 24) were established at three target starting sugar concentrations from dehydrated Cabernet franc grapes (24.5, 26.0, and 27.5°Brix) and a control (21.5°Brix) and were assessed for volatile organic compound (VOC) composition via gas chromatography-mass spectrometry (GC-MS). Wines also underwent quantitative descriptive analysis to identify and quantify sensory attributes by a trained panel (n = 11). Results show that the wines fermented with the yeast isolate contain significant differences in the concentrations of VOCs in the wines. Sensorially, the wines differed in intensity for a number of attributes, including red fruit aroma, black fruit flavour, and length of finish both within Brix treatments and amongst yeast strains. The most important differentiating factor amongst these wines was the combination of yeast strain at the highest starting sugar concentration (27.5°Brix). These findings may assist winemakers by informing the yeast strain choice for optimizing appassimento style wine quality in cool climates.
Details
- Title
- Sensorial and Volatile Analysis of Wines Made from Partially Dehydrated Grapes: An Ontario Case Study
- Authors
- Jennifer M Kelly (Author) - Brock UniversityDebra L Inglis (Author) - Brock UniversityGary J Pickering (Author) - University of the Sunshine Coast, Queensland, Sustainability Research Cluster
- Publication details
- Journal of Food Quality, Vol.2020, pp.1-12
- Publisher
- Hindawi Limited
- Date published
- 2020
- DOI
- 10.1155/2020/8861185
- ISSN
- 1745-4557; 0146-9428
- Copyright note
- Copyright © 2020 Jennifer M. Kelly et al. ,is is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
- Organisation Unit
- University of the Sunshine Coast, Queensland; Sustainability Research Cluster
- Language
- English
- Record Identifier
- 99498408902621
- Output Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web Of Science research areas
- Food Science & Technology