Bilyk V. Determination of iodide- and bromide ions with using spectrophotometric and spectrofluorometric methods with using electrochemical oxidation

Investigation objects: analytical forms of iodide - and bromide – ions under its coulometric, spectrophotometric and spectrofluorometric determination. Purpose: sensitivity and selectivity enhancement of determination of iodide in the presence of bromide ions at the expense of method consolidation: electrochemical (coulometry) and optical (spectrophotometry or spectrofluorometry). Methods: coulometry under controlled potential with the platinum electrodes; spectrophotometry; spectrofluorometry; linear-algebraic processing method of measurement data. Conditions of electrochemical oxidation of iodide- and bromide-ions at the platinum electrodes in the individual solutions and under consistent presence have been studied. Regularities of yield of products of fluorescein from time, pH, correlation of consentrations of halogens and fluorescein were researched. Capabilities of spectrofluorometric and extraction-photometric determination of iodide-ions with using electrochemical oxidation were researched. Degree of application: the results of research could be used for carrying out of measurements of maintenance of iodides and bromides in natural waters, potassium bromide. Obtained results are used in educational process at the Department of chemical metrology.