DETERMINATION CONTENT OF IODIDE AND BROMIDE IONS IN THE NATURAL WATERS OF DIFFERENT WATER SUPPLY SOURCES FOR THEIR USE IN PROCESS OF ENRICHING THE BIOMASS OF FRESHWATER ALGAE WITH IODINE

The article highlights the role of Iodine in the body of farm animals and poultry, the problem of enriching compound feeds with it, the stability and safety of Iodine in their composition, as well as the use of alternative organically bound forms of this element. The mineral composition of marine and freshwater algae depends on the environment in which they are cultivated. The unique properties of algae to intensively accumulate biomass and sorb various mineral elements from the cultivation environment make it possible for a controlled biotechnological process to enrich their biomass with specific macro- and microelements. To conduct research on increasing the biomass of the freshwater algae Lemna minor and enriching it with Iodine, it was very important to choose water for the cultivation environment that would not contain iodine ions and other mineral elements in high concentrations, which would negatively affect the increase in biomass and the accumulation of this element in it. The section "Materials and Methods" provides a list of water samples that were taken for research, describes the test method used, namely, the capillary electrophoresis method using the capillary electrophoresis system "Kapel-105M", the conditions for conducting the analysis and the standard samples used for calibrating the device. The results of the research indicate the analysis of bi-distilled water for the content of Iodide and Bromide ions in order to ensure the purity of the experiment, examples of electrophoregrams of one of the test samples and for comparison - one of the calibration solutions. The table presents the results of the content of Iodide and Bromide ions in natural water samples from different water supply sources. As a result of the research of water samples from different water supply sources, it was found that the Iodine content in them was below the detection limit, so there was no significance in choosing water for the cultivation medium according to this indicator. Lake water was chosen for the cultivation medium in terms of the content of Bromine ions, since their content in the studied samples was below the detection limit, which reduced the risk of a negative impact of this element on the cultivation of the biomass of the freshwater algae Lemna minor. Therefore, in the process of research aimed at increasing the biomass of Lemna minor and intensively enriching it with Iodine, lake water was chosen for the cultivation medium.