ДОСЛІДЖЕННЯ ВМІСТУ СУКРАЛОЗИ У ГАЗОВАНИХ НАПОЯХ РІЗНИХ ВИРОБНИКІВ

OF DIFFERENT MANUFACTURES It was established that spectroscopic and chromatographic methods of analyzing were used to determine sucralose. Given that the spectroscopic method of analysis requires specific preparation of samples is insufficiently accurate and sensitive, and the chromatographic method is expensive, the electro-analytical method of determination was chosen for the research. This is justified by the structure of the molecule (it contains functional groups that can be oxidized electrochemically). Electrochemical experiments were carried out using a potentiostat-galvanostat on a three-electrode setup with a glassy carbon electrode as a working electrode, a platinum electrode as an auxiliary electrode and a silver chloride electrode for comparison. The study utilized non-carbonated beverages Continente (Portugal) and Xixo (Hungary), as well as carbonated beverages Sumol Zero (Portugal) and Fanta Shokata (Ukraine).The manufacturer indicated the presence of sucralose in all of them. Based on the conducted research and corresponding calculations, it was established that the beverages are safe for consumption. Natural processes of photo-, photoelectro-, and electrodegradation in soil and wastewater reduce the problems of sucralose accumulation in the environment. Therefore, to prevent diffusion to the anode space with the release of gaseous chlorine, membrane electrolysis is applied (the membrane is made of polyvinylpyridine), which separates the cathode and anode spaces and does not allow chloride ions to reach the anode. In this case, water electrolysis or electrooxidation of hydroxyl ions occurs at the anode with the formation of gaseous oxygen. Electroanalytical determination of sucralose was also conducted using the method of cyclic voltammetry. The fact that the electrochemical determination of sucralose took place can be judged by a gradual but sharp increase in the current value at certain potential values. In this case, the intensity of this increase depends on the concentration of the sweetener. A solution with a neutral pH level was used as the background electrolyte. Materials based on carbon (graphite, carbon nanotubes) were used as the working electrode. We proposed a new method for determining sucralose, associated with the dependence of the peak current value during its electrochemical oxidation on the concentration. At the same time, a linear relationship between the peak current value and the sweetener concentration is maintained.