Using Kuzbass underground waters for soft drinks production

Providing the population with drinking water and water-based quality products is Russia's priority task, aiming at health preservation and improvement of citizens' living conditions. In addition to surface water, underground sources are used for drinking water supply. Manganese (II) can be found in a number of underground sources of the Russian Federation, including Kuzbass. We studied the effect of manganese present in groundwater on the ingredient (flavonoids, vitamin C) persistence of nectars and carbonated drinks (sucrose, citric acid, sodium benzoate, synthetic dyes). The studies were carried out in Kuzbass using titrimetric analysis, methods of molecular absorption spectroscopy and refractometry. We found a decrease in concentrations of all the key ingredients of non-alcoholic carbonated drinks and nectars in presence of manganese (II). Concentrations of sucrose remained unchanged. We explained the interaction of the ingredients of non-alcoholic carbonated drinks and nectars with manganese (II): the latter has a significant effect on their persistence, which reduces the quality characteristics of beverages during production and storage.