Analytical chemistry council

Metody i Ob'ekty Khimicheskogo Analiza

(METHODS AND OBJECTS OF CHEMICAL ANALYSIS)

Kiev University

An international journal devoted to all aspects of Analytical chemistry

 

ISSN 1991,0290

Ukr | En | Rus

Volume 3, No. 1, 2008

H. D. Levytska, O. O. Orshulyak

Voltammetry of calcon in the presence of hafnium ions

A method for the determination of hafnium by cyclic voltammetry was described. The method is based on the formation of hafnium electroactive complex with calcon (1-(2-hydroxy-1-naphtylazo)-1-naphtol-4-sulfonic acid). The optimum analytical conditions are the following: acetic buffer solution (pH 2.4), scan rate, 0.5 Vs-1. The reduction peak of the complex was proportional to the Hf(IV) concentration in the range 1.810-7 to 8.010-6 mol L-1. The detection limit of Hf(IV) concentration is 1.9910-7 mol L-1. The influence of foreign ions on the Hf(IV) determination was studied. It was established, that some metals like cadmium and titanium could be determined with hafnium simultaneously. The proposed method was tested on model solutions and used in the determination of hafnium in terbium base alloy.

Keywords: hafnium calcon cyclic voltammetry

Publisher: Analytical Chemistry Scientific Council of Ukraine

(Analytical chemistry department at Taras Shevchenko National University, 64 Vladimirskaya STR., Kiev, 01601 UKRAINE)
analysis@univ.kiev.ua, www.achem.univ.kiev.ua, +380-44-2393345

Papers published in Methods and Objects of Chemical Analysis are considered as publications suitable for PhD thesis

The journal website: www.moca.net.ua