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D. S. Tsar’kov, A. A. Zhirkov, M. A. Proskurnin

The effect of electrolytes on the sensitivity of thermal-lens measurements in aqueous solutions

Abstract

Thermooptical properties of aqueous solutions of strong electrolytes (H2SO4, HCl, NaCl, Na2SO4, and NaOH) were investigated, and it was found that the nature of the electrolyte affects the thermal lens signal. This effect cannot be considered as a sum of effects from ions comprising the electrolyte in question. The maximum increase in the sensitivity of thermal-lens measurements is observed in solutions of sulfuric acid (twofold increase compared to water for the concentration of 0.6M) and sodium chloride (1.5-fold increase at 2M), while the effect in hydrochloric acid is negligible.
Moscow University Chemistry Bulletin.
2007, Vol. 48, No. 4, P. 257
   

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