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M. A. Proskurnin, A. P. Smirnova, N. Yu. Ragozina
Determination
of uncoloured organic compounds in aqueous solutions by thermal lensing
Abstract
Thermal-lens spectrometry was used
for determining trace organic solvents and nonionic surfactants affecting
thermooptical properties of water. In the presence of inert colourants (for
increasing the sensitivity of thermal-lens measurements), the limits of
detection of ethanol and DMSO are 0.3% (6´10β2 mol/L) and 0.04% (3´10β3 mol/L), respectively. The limits of detection of
nonionic surfactants Tween-80, Triton X-100 ΠΈ Brij-35
are n´10β3
mol/L.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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