EXTRACTION AND SPECTROPHOTOMETRIC DETERMINATION OF TANTALUM (V) WITH 2-HYDROXYTHIOPHENOL AND ITS DERIVATIVES IN THE PRESENCE OF HYDROPHOBIC AMINES

  • Ali Z. Zalov Azerbaijan State Pedagogical University
  • Naila A. Verdizadeh Azerbaijan State Pedagogical University
  • Sultan G. Aliyev Azerbaijan State University of Oil and industrial
  • Shafa A. Mammadova Azerbaijan State University
DOI: https://doi.org/10.53555/as.v2i7.1278
Keywords: Tantalum, solvent extraction, spectrophotometry, ion-associate

Abstract

Mixed-ligand complexes of Tantalum (V) with thiocatecholic compounds (TCs){2-hydroxythiophenol
(HTP), 2,4-dihydroxythiophenol (DHTP), 2-hydroxy-5-chlorothiophenol (HCTP), 2-
hydroxy-5-bromothiophenol (HBTP) and 2-hydroxy-5-iodothiophenol (HITP)} in the presence of
hydrophobic amines (Am) have been studied by spectrophotometry. As hydrophobic amine were
used aniline (An), N-methylaniline (MAn), N, N-dimethylaniline (DAn), aminopyridine (APy),
dipyridyl (DiPy), guanidine (Gu), diphenylguanidine (DPG), and triphenylguanidine (TPG).
Extraction of mixed ligand complexes is maximal at pH 2.4-6.8. The best organic solvent was
chloroform. Under the optimum conditions, the molar absorptivities (emax) and the degrees of
Tantalum extraction (R%) in this solvent were in the ranges (1.60-3.94)×104 L mol-1
cm-1
and
(98.1-98.6)%, respectively. The molar ratio of the reacting species was 1:2:2 (Ta:TCs:Am). If
APy and DiPy molar ratio is 1: 2: 1. The Beer’s law was applicable in the range of 1.0-100 µg· ml1
. The method is free from common interferences. A procedure has been developed for extraction –
spectrophotometric determination tantalum in steel.

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Author Biographies

Ali Z. Zalov, Azerbaijan State Pedagogical University

Department of Analytical Chemistry, Azerbaijan State Pedagogical University, st. Gadzhibekova 68, Baku, 1000,
Azebaijan

Naila A. Verdizadeh, Azerbaijan State Pedagogical University

Department of Analytical Chemistry, Azerbaijan State Pedagogical University, st. Gadzhibekova 68, Baku, 1000,
Azebaijan

Sultan G. Aliyev, Azerbaijan State University of Oil and industrial

Department of General Chemistry, Azerbaijan State University of Oil and industrial, st. Azadlg 34, Baku, 1000,
Azebaijan

Shafa A. Mammadova, Azerbaijan State University

Department of General Chemistry, Azerbaijan State University of Oil and industrial, st. Azadlg 34, Baku, 1000,
Azebaijan

Published
2016-07-31
How to Cite
Zalov, A. Z., Verdizadeh, N. A., Aliyev, S. G., & Mammadova, S. A. (2016). EXTRACTION AND SPECTROPHOTOMETRIC DETERMINATION OF TANTALUM (V) WITH 2-HYDROXYTHIOPHENOL AND ITS DERIVATIVES IN THE PRESENCE OF HYDROPHOBIC AMINES. IJRDO-Journal of Applied Science, 2(7). https://doi.org/10.53555/as.v2i7.1278
Issue
Vol. 2 No. 7 (2016): IJRDO - Journal of Applied Science
Section
Articles

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