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