TITLE:
Spectroscopic Investigation of the Complex Formation of Niobium Using 2,6-Dithiolphenol and Aminophenols
AUTHORS:
Kerim A. Kuliyev, Nailya A. Verdizadeh
KEYWORDS:
Niobium, Solvent Extraction, Spectrophotometry, Mixed-Ligand Complexes
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.6 No.9,
August
21,
2015
ABSTRACT: A new, simple, precise, selective and sensitive method for the extraction and spectrophotometric determination of niobium has been described. Mixed-ligand complexes of Niobium (V) with 2,6-dithiolphenol (DTP) and aminophenols (AP) have been studied by spectrophotometry. Extraction of mixed-ligand complexes is maximal at pH 3.6 - 5.0. The optimal conditions for the formation and extraction of mixed-ligand compounds have been found. The molar ratio of the reacting species was 1:2:2 (Nb:DTP:AP). The Beer’s law was applicable in the range of 0.05 - 4.0 μg/ml. The method is free from common interferences. A procedure has been developed for extraction-spectrophotometric determination of Niobium in steel.