Fruit growing
and viticulture of South Russia

Annotation

In modern wine-making, a concentrated grapes must, including rectified must, is widely used to provide the necessary conditions for the content of sugars in the production of semi-dry and semi-sweet table wines. This product is also allowed to use at the wort stage to increase the alcohol content of wines, in the case of unfavorable weather conditions, when the mass concentration of sugars in the grapes is not sufficient. However, often instead of grapes concentrated must the surrogates or falsifications are introduced in the market, the use of which is forbidden for the wine production. The purpose of this paper is to analyze the information presented in various documents and literature on the quality indicators of grapes concentrated wort and methods for their control. The Institute "Magarach" is working on the study of the grapes must concentrated to search and justify the indicators, used for identification of its origin. It is shown that the share of such indicators as the proportion of tartaric and citric acids in the total amount of acids, and the content of sucrose in the total amount of sugars, and the ratio of glucose / fructose content differ in the samples of grapes and non-grapes origin. The normative documents of Russia, and the European Union and the International Organization of grapes and wines devoted to methods for assessing the quality and authenticity of grapes juices and concentrated worts are analyzed. The additional indicators for control of grapes origin and quality of concentrated grapes must are selected as the profile of organic acids and sugars, pH, electrical conductivity; content of sorbic and benzoic acids and their salts, hydroxymethylfurfural.