A. A. Zhirkov, S. N. Bendrysheva, M. A. Proskurnin, N. Yu. Ragozina, B. K. Zuev
The effect of electrolytes on the sensitivity of thermal-lens
determination in aqueous solutions
of several common surfactants (SDS, Triton X-100, Brij-35, and Tween 80) as
modifiers of thermooptical properties of aqueous solutions on parameters of
thermal-lens analytical determination of several model systems are studied.
Selection criteria for the compositions of modified aqueous media for thermal
lens analytical trace determination are discussed. The increase in the
metrological parameters of thermal-lens measurements in nonionic-surfactant
solutions is comparable with that for organo-aqueous mixtures. A twofold
decrease in the limits of detection compared to aqueous solutions observed in
2.5% m/m surfactant solutions is achieved.
Copyright (C) Chemistry Dept., Moscow State University, 2002