THE JUSTIFICATION OF THE SHELF LIFE AND THE QUALITY ASSESSMENT OF JUICE-CONTAINING DRINKS BASED ON GENUS <i>RUBUS </i>BERRIES
The purpose of the researches was to develop the recipe of soft drink on the basis of the juice received from berries Rubus chamaemorus, Rubus Saxatilis L. and coniferous cedar extract to carry out the assessment of its quality. The research problems were to develop the recipe of juice drink; to define the indicators of its quality; to investigate the dynamics of titrable acidity of drink in the course of its storage. The objects of the research were 5 prototypes of the juice drinks made of cloudberries berries (Rubus chamaemorus), stone bramble stony (Rubus Saxatilis L.) coniferous water extract of cedar. The results of the assessment of the quality of physical and chemical and organoleptic indicators were presented. The tasting assessment of juice drinks which allowed establishing the best version (compounding No. 4) from analyzed prototypes was carried out. Organoleptic assessment showed that with the increase in the share of sugar sour the smack goes down, at the increase in the amount of berry juice in compoundings, sour aftertaste increases, color becomes brighter. The compliance of drink to the requirements of TR TC 023/2011 and State Standard 28188-2014 was established. TR TC 023/2011 regulates that the maintenance of mass fraction of titrable acids in juice drinks should not exceed 1.5 %. Because of berry raw materials used for production of soft drink contain various organic acids in its structure, organic acids have not been added into the drink not to exceed the value of the drink’s рН and not to worsen the flavor. On the basis of the research of dynamics of titrable acidity of drinks the term of their storage was reasonable. It was established that titrable acidity of juice drink increased at storage, reaching limit value on the 21-st day (1.5 %), it testified that the shelf life of the drink came to an end on the 21-st day.