Orshulyak O. Voltammetry of Zr(IV) and Hf(IV) ions in the presence of azodies.

The thesis is devoted to studying of the voltammetry of Zr(IV) and Hf(IV) ions in the presence of azodies. Voltammetric activity of toron and acid chrome blue T was studied. It was show possibility voltammetric determination of toron and acid chrome blue T. On the base obtained results, it was established that Zr(IV) and Hf(IV) not form complex with eriochrome red PE. Optimal conditions of complex forming Zr(IV) and Hf(IV) with eriochrome red B calcon and calces were found. Stability constants of complexes and form existence of Zr(IV) and Hf(IV) ions in the solution were calculated. The detection limits of Zr(IV) and Hf(IV) concentration were estimated. The in fluence of foreign ions on the Zr(IV) and Hf(IV) determinanation was studied. The elaborated methods of Zr(IV) and Hf(IV) were tested for hafnium determination in alloy Tb-Hf-Al; zirconium determination in alloy Tb-Zr-Si, in the drum of airplane’s wheel and object environment.