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A. P. Smirnova, R. Yu. Shimko, M. A. Proskurnin
Investigation of processes
in two-phase systems using thermal-lens spectrometry by the example of cobalt(III)
tris-(2-nitroso-1-naphtholate)
Abstract
The optimum parameters of a
thermal-lens spectrometer preventing the blooming of convection in organic solvents
and not affecting the instrumental sensitivity and reproducibility of thermal
lensing in two-phase system are selected. The mass-transfer rate of cobalt(III)
tris-(2-nitroso-1-naphtholate) in toluene as a function of the distance from
the interface was measured, and an agreement of the experimental data with a
Fick equation-based model is shown. The limit of detection of cobalt using
thermal-lens spectrometry is 1.0´10–8 M, the linear
calibration range is 2.0´10–7–1.0´10–6 M.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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