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Comparison of Different Categories of Slovak Tokaj Wines in Terms of Profiles of Volatile Organic Compounds

机译:不同类别的斯洛伐克Tokaj葡萄酒在挥发性有机化合物型材方面的比较

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摘要

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 Tokajské samorodné 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 (GC×GC) 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 γ-octalactone, (E)-6-methylhept-2-en-4-one, and lack of benzaldehyde were typical for Tokajské samorodné 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).
机译:本工作涉及斯洛伐克Tokaj葡萄酒区的葡萄酒中挥发性有机化合物(VOC)的表征。学习的葡萄酒样本分为三组 - 来自注册的Tokaj藤品种的品种葡萄酒,电影葡萄酒Tokajskésamorodnédry,天然甜蜜的甜点葡萄酒Tokaj选择。使用优化的固相微萃取(SPME)提取来自葡萄酒的VOC,并通过综合二维气相色谱(GC×GC)分析,耦合到高分辨率飞行时间质谱(HRTOF-MS)。总共,在所有46个研究样本中确定了176 Voc。结果发现,品种葡萄酒中的VOCs总数通常高于波氏葡萄酒。所有三个学习类别都显示出具有显着差异的特征VOC曲线。品种葡萄酒的特征是源自葡萄的浓度浓度和萜类化合物。 γ-辛酸酯,(e)-6-甲基-2-烯-4-一度,缺乏苯甲醛的存在典型为Tokajskésamorodnédy。 tokaj选择表达了苹果酸二乙酯,苯甲醛和糠醛的最高浓度。还观察到了几个有趣的趋势。发酵产物的浓度在葡萄葡萄酒中最高,而长期成熟的TOKAJ特殊葡萄葡萄葡萄葡萄葡萄醇(2-苯基乙醛,2-苯基乙酸乙酯和2-苯基乙醇),典型的含量是典型的。 CIS-WHISKEY内酯,和老化(1,1,6-三甲基-2H-萘,糠醛和5-甲基糠尿)。

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