Rydchuk P. Voltammetry of Rh(III) in the presence of organic reagents

The thesis deals with the study of Rh(III) interaction with oxime derivatives (5-(2-chlorophenyl)-furan-2-carbaldehydeoxime and 5-(4-chlorophenyl)-furan-2-carbaldehydeoxime), triphenylmethane dyes (pyrocatechol violet, eriochrome R, chrome azurol S, xylenol orange), azo dye salicylic yellow and pyrocatechol for the elaboration of voltammetric methods for rhodium determination. The optimum conditions of the analytical signals obtaining have been established. The hypothetic schemes of the first stage of furanoxime derivatives electrochemical reduction on a dropping mercury electrode and schemes of the enhancement of catalytic hydrogen current peaks in the solutions of rhodium(III) in the presence of the examined dyes and pyrocatechol have been suggested. The voltammetric methods of Rh(III) determination have been developed (LOQ is from 0.8 ng mL-1 to 0.3 mkg mL-1), their selectivity towards platinum group elements and other concomitant metals has been investigated. The methods have been approved during rhodium determination in catalyst, resistor and quartz resonator.