Classification of Botrytized Wines Based on Producing Technology Using Flow-Modulated Comprehensive Two-Dimensional
Olga Vyviurska1, Nemanja Koljančić1, Ha Anh Thai1
1Faculty of Chemical and Food Technology, Institute of Analytical Chemistry, Slovak University of Technology in Bratislava, 81237 Bratislava, Slovakia.
Foods (Basel, Switzerland)
|April 30, 2021
Summary
Flow-modulated comprehensive two-dimensional gas chromatography analyzed chiral compounds in botrytized wines. This technique revealed differences in ethyl lactate enantiomeric distribution and monoterpene alcohols, distinguishing varietal wines from others.
Area of Science:
- Analytical Chemistry
- Food Science
- Oenology
Background:
- Enantiomeric ratios of chiral compounds are key indicators of wine quality and the impact of winemaking techniques.
- Comprehensive two-dimensional gas chromatography (GC×GC) offers enhanced separation and resolution for complex analyses.
Purpose of the Study:
- To apply flow-modulated GC×GC for enantioselective analysis of botrytized wines.
- To investigate the influence of winemaking technology on the chemical composition of botrytized wines.
Main Methods:
- Utilized flow-modulated comprehensive two-dimensional gas chromatography (GC×GC).
- Analyzed enantiomeric distributions of ethyl lactate and monoterpene alcohols.
- Employed hierarchic cluster analysis for data processing and classification.
Main Results:
- Significant differences were observed in ethyl lactate enantiomeric distribution and monoterpene alcohol presence.
- Varietal wines (Furmint, Muscat Lunel, Lipovina) were clearly separated from botrytized wines and essences.
- A correlation was found between botrytized wines and varietal wines fermented with grape skins.
Conclusions:
- Flow-modulated GC×GC is effective for differentiating wine types based on chiral compound analysis.
- Winemaking technology, particularly botrytis and grape skin fermentation, significantly impacts wine composition.
- Further analytical parameters are needed to fully distinguish between botrytized wines and Tokaj essences.
Keywords:
Tokaj wine regionbotrytized winesenantioselective analysisflow-modulated comprehensive two-dimensional gas chromatographyMore Related Videos
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