TABLE TYPE ROSE WINE FROM FRENCH GRAPES VARIETIES GROWN IN THE FOOTHILLSAREA OF ALTAI KRAI

doi: 10.25712/ASTU.2072-8921.2021.04.001

Abstract

For the first time, a new table-type rose wine was produced from grapes varieties grown in the severe soil and climate zone of Altai region. The paper has both significant relevance and novelty for further implementation in industry. Original juices produced from French grape varieties Pinot Noir and Muscat Ottonel were distinguished by high accumulation of sugars 14.7-17.8 g/100 g. The titratable acids level was slightly higher compare to standard parameters (8.0 g/dm³) and ranged from 11.2 up to 11.8 g/dm³. Polyphenols level was registered as 2339-2892 mg/dm³ indicates the high quality of raw material. Grape wine materials were prepared by micro-winemaking method with mostly complete fermentation of natural sugar – 0.36-0.59%. Alcohol value – 10.9-12.8% vol. The volatile acids accumulation fits the maximum permissible concentration (no more than 1.20 g/dm³), and ranged from 0.36 to 0.59 g/dm³. As a result of oxidative processes, the content of polyphenols decreased from 2339-2892 mg/dm³ in juices to 1654-2581 mg/dm³ in wine materials, in normalized extract from 29.1 to 23.7 g/dm³, but did not reduce their high quality. In process of long-term aging of wine materials under proper conditions, minor changes occurred that did not affect the quality and physicochemical characteristics. The producing of a new rose wine was carried out by blending technology. Mixing of white grape wine material with red one was carried out in the following percentages ratio – 90:10; 80:20; 70:30; 60:40; 50:50. According to the results of tasting assessment the best option was selected in a ratio of 60:40. Table-type rose grape wine has a harmonious mild taste, bouquet, varietal tones can be traced in the aroma. It has been proved that in terms of the main physical and chemical parameters and organoleptic qualities, the obtaining wine corresponds to State Standard 32030-2013 "Table wines and table wine materials. General technical requirements".