Graphic image of high quality wines

Abstract

The objects of the research were samples of high quality wines of various types produced by the enterprises of the Krasnodar Territory, the Rostov Region and foreign producers of different grape varieties. The method of automatic titration of acids in wines was applied by coulometric generation of the base with the recording of the results of potentiometric indication on the computer. The influence of the grape variety and the duration of aging of table wine on the appearance of the titration curves was carried out using 77 technical grades and clones of grapes (44 red grapes and 33 white grapes) from the Anapsko-Tamanskaya zone of the Krasnodar Territory from 2001 to 2016. Grapes of the studied varieties were processed under the micro nodulation conditions according to two schemes. Dry table red wines were obtained by fermentation on the mash. Dry table white wines were produced using the high quality low-oxidized wines. The experimental studies confirming the individuality of the titration curves and the absorption spectra of wine samples for specific brands have been carried out. The principal possibility was shown of using the coordinates of the titration curve of a wine sample for establishing a relationship with the grape variety and the authenticity of the production of wines with the protected geographical indication and appellation of origin. To confirm the authenticity of the wine products, it was suggested to compare the data matrix with the coordinates describing the average titration curve of a specific wine product obtained by the manufacturer with a similar matrix obtained by the controlling party under the reproducibility conditions. When the appearance of the titration curves of red wines obtained from different grape varieties was identical, it was suggested to additionally apply a matrix of data describing the absorption spectrum in the visible region. Key words : organic acids, authenticity of wines, potentiometric titration curves, spectral characteristics DOI: http://dx.doi.org/10.15826/analitika.2018.22.3.003 (Russian) O.N. Shelud`ko 1,2 , N.K. Strizhov 2 , T.I. Guguchkina 1 , T.V. Guzik 2 1 Northern-Caucasian Federal Scientific Center for Horticulture, Viticulture, Winemaking. Russian Federation, 350901, Krasnodar, 40th Anniversary of the Victory st., 39 2 Kuban State Technological University, Russian Federation, 350072, Krasnodar, Moscow st.,2