MINERAL COMPOSITION AS A MARKER OF TERRITORIAL AFFILIATION OF WINES OF PROTECTED DESIGNATIONS OF ORIGIN

The paper discusses methods for identifying wines based on regional characteristics, which consists of establishing a connection between the component composition of wines and soils corresponding to the area where grapes grow. It has been shown that markers of regional affiliation can be components whose content in wines practically does not change during the production process. The results of a study of the mineral composition of wines produced by the winemaking enterprise OOO “Imenie Sikory” are presented. Using atomic absorption spectroscopy using the Kvant Z spectrometer (NPF OOO “KORTEK”, Russia), 12 metal elements (Co, Mn, Rb, Cr, Cs, Al, Ba, Zn, Sr, Li, Na, Mg) were determined in the course of studies on atomic emission and absorption spectra. A study was also conducted of the mineral composition of soil samples from vineyards where grapes used for wine production grew. Using the methods of correlation and cluster analysis, as well as using the “random forest” algorithm (for wine samples, the initial data were the content of elements and their pairwise ratios), it was revealed that the mineral composition can serve as a marker of the regional affiliation of wine products, since the studied wine samples are within each variety have a stable mineral composition, regardless of the year of harvest (correlations between the year and the content of elements are insignificant), determined by the characteristics of the site where the grapes grow. Quantitative determination of the components of the mineral complex in combination with mathematical processing of the results allows us to establish the origin of the wines with a reasonable degree of probability. The mineral composition of the studied wines is unique and is determined by the soil characteristics of the vineyard areas of the “Semigorye” geographical object.