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T. A. Filimonova, V. V. Senyuta, M. A. Proskurnin, A. V. Fokin, O. B. Ovchinnikov, S. V. Egerev
Estimation of
performance parameters of afrontal variant of optoacoustic determination with a
model system
Abstract
Using a model system, the applicability of
the frontal configuration of optoacoustic spectroscopy in analytical practice
is shown. An optoacoustic cell made using layered-prism geometry was designed
and tested; it provides the work with layer thickness of 20–100 µL and sample
volumes 50–100 µL. The conditions for the determination of iron(II) as tris(1,10-phenanthrolinate)
with the detection limit of 3×10–7 M, which
is lower that the detection limit for similar excitation conditions and for the
same determination procedure for thermal-lens spectrometry (4×10–7 M). The
determination has high reproducibility (relative standard deviation for 10–6M is 0.005)
and rapidity (1 min per sample detection).
Copyright (C) Chemistry Dept., Moscow State University, 2002
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