DETERMINING THE QUALITY OF BIRCH SAP HARVESTED IN THE KRASNOYARSK REGION

The aim of the study is to investigate the chemical composition, organoleptic, physicochemical indicators of birch sap harvested in different areas of the Krasnoyarsk Region. Objectives: to study the chemical composition of birch sap; to identify the content of basic nutrients; to determine the qualitative and quantitative composition of minerals in birch sap; to characterize the organoleptic and physicochemical indicators of birch sap. The object of the study is birch sap harvested in the Krasnoyarsk Region. In the course of the study, generally accepted methods for determining organoleptic and physicochemical indicators in the food industry were used. The chemical composition was studied using the Kapel capillary electrophoresis system. The conducted studies of the organoleptic and physicochemical characteristics of birch sap showed its compliance with the requirements of RSFSR RST 537-82. The main chemical nutrients of birch sap are sugars (1.07–8.96 %), including reducing ones (0.54–4.48 %). Carbohydrates are represented by fructose (1.254–3.419 %) and glucose (1.180–4.081 %). Lipid components are absent. Nitrogen compounds are present in trace amounts, represented by individual amino acids and amides. The mineral substances in birch sap contain 17 elements, the most important of which are magnesium (0.199–0.540 mg/kg), zinc (0.549–1.486 mg/kg), calcium (1.473–3.110 mg/kg), potassium (50.51–152.45 mg/kg), as well as fluorides (44.61–117.6 mg/dm3), sulfates (37.38–58.19 mg/dm3) and phosphates (52.09–231.2 mg/dm3). The results obtained allow us to recommend birch sap as a raw material for beverage production, thereby expanding the range of soft drinks, low-alcohol drinks and alcoholic beverages.