| Title: | Comparison of Different Categories of Slovak Tokaj Wines in Terms of Profiles of Volatile Organic Compounds |
| Author(s): | Furdikova K; Machynakova A; Drtilova T; Spanik I; |
| Address: | "Institute of Biotechnology, Slovak University of Technology in Bratislava, Radlinskeho 9, 81237 Bratislava, Slovakia. Institute of Analytical Chemistry, Slovak University of Technology in Bratislava, Radlinskeho 9, 81237 Bratislava, Slovakia" |
| DOI: | 10.3390/molecules25030669 |
| ISSN/ISBN: | 1420-3049 (Electronic) 1420-3049 (Linking) |
| Abstract: | "The present work deals with the characterization of volatile organic compounds (VOCs) in wines from the Slovak Tokaj wine region. Studied wine samples were divided into three groups-varietal wines from registered Tokaj vine varieties, film wines Tokajske samorodne dry, and naturally sweet botrytized wines Tokaj selections. The VOCs from wines were extracted using optimized solid phase microextraction (SPME) and analyzed by comprehensive two-dimensional gas chromatography (GCxGC) coupled to high-resolution time-of-flight mass spectrometry (HRTOF-MS). In total, 176 VOCs were identified in all 46 studied samples. It was found that the total number of VOCs in varietal wines was generally higher than in botrytized wines. All three studied categories showed characteristic VOC profiles with significant differences. Varietal wines were characterized by higher concentrations of esters and terpenoids originating from grapes. The presence of gamma-octalactone, (E)-6-methylhept-2-en-4-one, and lack of benzaldehyde were typical for Tokajske samorodne dry. Tokaj selections expressed the highest concentration of diethyl malate, benzaldehyde, and furfurals. Several interesting trends were also observed. The concentration of fermentation products was highest in varietal wines, while long-term matured Tokaj special wines were typified by the presence of compounds related to noble-rotten raisins (2-phenylacetaldehyde, ethyl 2-phenylacetate, and 2-phenylethanol), wood (cis-whisky lactone), and aging (1,1,6-trimethyl-2H-naphthalene, furfural, and 5-methylfurfural)" |
| Keywords: | "Chromatography, Gas Esters/chemistry Fermentation Slovakia Solid Phase Microextraction Terpenes/analysis Vitis/*chemistry/classification Volatile Organic Compounds/*analysis Wine/analysis/*classification Tokaj comprehensive gas chromatography high-resolut;" |
| Notes: | "MedlineFurdikova, Katarina Machynakova, Andrea Drtilova, Tereza Spanik, Ivan eng APVV-15-0333/Agentura na Podporu Vyskumu a Vyvoja/ APVV-15-0355/Agentura na Podporu Vyskumu a Vyvoja/ ITMS 26240220084/Ministry of Education, Science, Research and Sport of the Slovak Republic within the Research and Development Operational Program for the project University Science Park of STU Bratislava, co-funded by the European Regional Development Fund/ Switzerland 2020/02/09 Molecules. 2020 Feb 4; 25(3):669. doi: 10.3390/molecules25030669" |
