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G. A. Kochelaeva, V. M. Ivanov, A. R. Huseynova

The complexation in the system molybdenum(VI) ― 2-(3,5-di-brom-2-pyridylazo)-5-diethylaminophenol― hydroxylamine in the solution and on the sorbent


The complexation in the system molybdenum(VI)-(3,5-di-Br-PAAPh)-hydroxylamine(HA) has been studied by using spectrophotometric method. It is shown, that mix-ligand complexe is formed with the Mo:3,5-di-Br-PAAPh:HA ratio equal to 1:1:2 and molaz coefficients of absorption 3.9×104 (610 nm). Kinetic of complexation in the system as studied by spectrophotometric method. Kvis and Eact these reactions of complexation were determined. The optimal conditions (pH, the equilibration time, the mass-ratio of solution and sorbent) of the concentration this complex on the sorbent silochrom C-120 were found. The concentration coefficient not lowers then 67 for the volume water phase 20 ml.The equation of graduating plotsfor detection of 1,9-7,7 μgof molybdenumin phaseof the sorbentwas gotby diffuse reflection spectroscopy and colour characteristicsmethod. The lower detection limits were determined for colour characteristics.
Moscow University Chemistry Bulletin.
2002, Vol. 43, No. 3, P. 155

Copyright (C) Chemistry Dept., Moscow State University, 2002
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