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Agnihotri, N. and Agnihotri, R. (2012) Extractive Spectrophotometric Determination of Niobium (V) Using 3-Hydroxy- 2-(4’-Methoxyphenyl)-4-Oxo-4H-l-Benzopyran as a Complexing Agent. The Open Analytical Chemistry Journal, 6, 39-44.
http://dx.doi.org/10.2174/1874065001206010039

has been cited by the following article:

• 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.