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International Journal of Chemical Studies

Vol. 3, Issue 2 (2015)
Spectrophotometric determination of trace Amounts of molybdenum after extraction of its complexes with 2-hydroxythiophenol and its derivatives in the presence of hydrophobic amines into chloroform


Author(s): Abel M Maharramov, Ali Z Zalov, Naila A Verdizadeh, Afet B Hajieva

Abstract: The mixed-ligand complexes (MLC) of molybdenum (VI) with 2-hydroxythiophenol (HTP) and its derivatives (HTPDs) {(2, 5-dihydroxythiophenol (DHTP) and 2-hydroxy-5-chloro­thio­phenol (HCTP)} in the presence of hydrophobic amines have been investigated by spec­tro­pho­­to­met­ric method. As hydrophobic amines (HAs) 3, 4-xylidine (o-Xyl), 2, 4-xylidine (m-Xyl), and 2,5-xylidine (p-Xyl) were used. The condition of complexing and extraction, physical-chemical and analytical characteristics of this complex have been found. The obtained mixed-ligand com­plexes have a composition of 1:2:2 {Mo (V): HTPDs: AA}. Optimal conditions for their li­quid-liquid extraction were found: organic solvent (chloroform), pH, concentration of the reagents and extraction time. Under the optimal conditions, the complexes have absorption maxima (λmax) at 522-545 nm and molar absorptivities (εmax) between 3.6·104 dm3 mol–1 cm–1 (HCTP+o-Xyl) and 4.7·104 dm3 mol–1 cm–1 (DHTP+o-Xyl). The degrees of extraction were R=98.4-98.9%. The extraction-photometric methods of mo­lybdenum determination have been worked out. The influence of diverse ions on determi­na­tion of molybdenum has been studied. The proposed method was applied successfully to determine amount of molybdenum in steel, samples of soil and pea.

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How to cite this article:
Abel M Maharramov, Ali Z Zalov, Naila A Verdizadeh, Afet B Hajieva. Spectrophotometric determination of trace Amounts of molybdenum after extraction of its complexes with 2-hydroxythiophenol and its derivatives in the presence of hydrophobic amines into chloroform. Int J Chem Stud 2015;3(2):88-94.
International Journal of Chemical Studies