Keywords
Abstract
The newest technological solutions, climate change and updating demand patterns are forcing producers to confirm the regional and varietal identity of their products. One of the main aspects of effective interaction between producer and consumer is the guarantee of wine authenticity, which requires improving the system of its authentication. The goal of the study is to systematize the data, which characterizes base wines of white grape varieties from various viticultural and winemaking regions of Crimea. The studies were carried out in the period 2017-2022 on samples of white grape varieties (‘Aligote’, ‘Muscat Blanc’, ‘Rkatsiteli’, ‘Rhine Riesling’, ‘Sauvignon Blanc’, ‘Chardonnay’) and base wines produced from them in viticultural and winemaking regions of Crimea: 06. Western Highland-Steppe; 08. Crimean Western Coastal Piedmont; 12. Southern Coast of Crimea. In total, 38 batches of grapes and 48 samples of base wines were used in the work. In the studied samples of grapes and base wines, the mass concentrations of sugars, titratable and organic acids, volume fraction of ethyl alcohol, electrical conductivity, buffer capacity and pH value were determined. The glucoacidimetric index and indicator of technical ripeness of grapes, glucose-fructose index, ratio of tartaric and malic acids, Selyaninov’s hydrothermal coefficient, Huglin heliothermal index, and Winkler thermal index were calculated. It was established that the studied viticultural and winemaking regions of Crimea are characterized by a sufficiently high heat supply and insufficient precipitation. The dynamics of the content of organic acids, buffer capacity and electrical conductivity in the system grapes-wine is shown. Summarizing of study results is presented in the form of variation ranges for a number of indicators, which we defined as zonal. In further studies, the list of indicators and their limit values will be specified.