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Information × Registration Number 0203U008008, 0101U002786 , R & D reports Title Metrological ground and development of analyse methods of multicomponent systems and investigation of solution equilibria with using multidimensional spectra popup.stage_title Head Drozd A., Registration Date 03-04-2003 Organization Kharkov National University named after V.N.Karazin popup.description2 The subject of investigation: the methods of determination of concentrations of halide ions The goal of the work: metrological ground for multicomponent analysis of mixtures. The work is carried out using spectrophotometric and coulometric techniques. Simulation is performed on computer. When determining bromide and iodide as fluorescein halogenation products, it is studied, through spectral characteristics of the analytical form, the dependency of analyte signal on the time of interaction, the temperature of the reaction mixture, catalyst concentration. For determination of haloide ions, a variant of multi-way spectroscopy, a combination of electrochemical oxidation with spectrophotometric determination of haloides with fluorescein, is proposed. The relation between the haloide ions content and absorbance of flourescein halogenation products at different wavelengths is established by principal component regression. Theoretical background of multicomponent coulometry is reviewed. A variant of method ofcoulometric determination of bromide and iodide, when present together, is developed. The method includes sequential electrochemical oxidation of iodide (at E = 0.75V vs. silver chloride reference cell), extraction of iodine and electrochemical oxidation of bromide (at E = 1.1V). Determinations of bromide and iodide in model solutions and bromide bath mineral water have been performed. The concentration ranges and uncertainties of the determination of bromide and iodide are compared for the methods: direct coulometric one on platinum electrode, spectrophotometric one by fluorescein. Product Description popup.authors popup.nrat_date 2020-04-02 Close