International Journal of Chemical Studies
Vol. 4, Issue 2 (2016)
Sensitive spectrophotometric determination of trace amounts of vanadium (iv, v) using 2,6-dithiol-4-propyl-phenole and hydrofob amins
Author(s): Verdizade NA, Kuliev KA, Aliev SG, Amanullaeva GI, Mamedova Sh A
Abstract: Dithiol-4-propylphenole (DTPP) has been synthesized and characterized with IR and NMR Spectroscopic methods. A simple and spectrophotometric method has been developed for the deter-mination of trace amounts of Vanadium (IV, V). The reagent forms an blue coloured insoluble in water complex with Vanadium (IV, V) in acidic medium (pH 2.75-2.85). In the presence of hydrophobic amines form ternary complexes. Aniline (An) and N-methylaniline (mAn) were used as the hydrophobic amine. The molar absorptivity of coloured species are (2.75-2.85)• 104 L.mol-1 cm-1. Beer’s law is obeyed in the range 0.05–3.2 μg/ml of Vanadium (IV, V) at λmax 630-634 nm. Vanadium (IV, V) forms 1:2:2 complex with DTPP and Am, stability constant of the complex was found to be 9.7-9.8 (pHopt = 3.3-5.5). The proposed method was successfully applied to the analysis of vanadium in alloys, natural water samples and plant material. The results obtained were agreed with the reported methods at the 95 % confidence level. The optimum reaction conditions and other analytical parameters were investigated to enhance the sensitivity of the present method. The detailed study of various interferences made the method more selective.
Pages: 86-92 | 1031 Views 13 Downloads
How to cite this article:
Verdizade NA, Kuliev KA, Aliev SG, Amanullaeva GI, Mamedova Sh A. Sensitive spectrophotometric determination of trace amounts of vanadium (iv, v) using 2,6-dithiol-4-propyl-phenole and hydrofob amins. Int J Chem Stud 2016;4(2):86-92.