Voltammetric determination of zirconium(IV) and hafnium(IV)
- Kazan State Univ., Tatarstan (Russian Federation); and others
Zirconium (IV) and hafnium (IV) do not form coordination compounds with 8-mercaptoquinoline and its alkyl derivatives. For determination of these elements in various samples, the most appropriate reagent appears to be 2-carboxy-8-mercaptoquinoline. A new metal-oxygen bond is formed in the complexes with 2-carboxy-8-mercaptoquinoline, in contrast to the complexes with its alkyl derivatives. Moreover, this reagent a reveals the properties of a bi- and tridentate ligand. From the data of redox potentiometry, zirconium (IV) and hafnium (IV) form the complexes of composition 1:2 and 1:3 with 2-carboxy-8-mercaptoquinoline; which were isolated in the form of red crystals. The aim of this work is to develop procedures for the direct voltammetric determination of Zr(IV) and Hf(IV) in the form of their complexes with 2-carboxy-8-mercaptoquinoline in aqueous solutions and extracts using a stationary mercury film electrode (SMFE) in dimethylformamide (DMFA) and dichloroethane (DCE).
- OSTI ID:
- 147121
- Journal Information:
- Journal of Analytical Chemistry, Journal Name: Journal of Analytical Chemistry Journal Issue: 8 Vol. 49; ISSN 1061-9348; ISSN JACTE2
- Country of Publication:
- United States
- Language:
- English
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