Complex Formation and Liquid-Liquid Extraction in the Niobium(V) – 2,4-Dihydroxythiophenol– Hydrophobic Amines System
| Autor: | ALI Z. ZALOV |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Pakistan Journal of Analytical & Environmental Chemistry, Vol 16, Iss 02, Pp 19-27 (2015) |
| Druh dokumentu: | article |
| ISSN: | 1996-918X 2221-5255 |
| Popis: | The formation and solvent extraction of new ion-association com¬ple- ¬xes between anionic chelat of niobium(V) with 2,4-dihydroxy¬thio¬phenol (DHTP) and hydrophobic amines (HAs). The HAs were aniline (An), N-methyl¬aniline (MAn), N,N-dimethylaniline (DAn). The optimum conditions for the extraction of mixed ligand complexes (MLC) (organic solvent, extraction time, acidity of the aqueous phase, concentration of reagents), some key constants {association constant (β), extraction constant (Kex)} and analytical characteristics were determined. The molar absorptivities of MLC were calculated ε =(3.5-3.9) × 104 L mol–1 cm–1 . The Beer’s law was applicable in the range of 2.2-100 μg/mL. |
| Databáze: | Directory of Open Access Journals |
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