Vladimir V Egorov

Learn More
The influence has been studied of the membrane and solution composition on the response of H(+)-ISEs with plasticized polymer and liquid membranes based on the neutral carriers N,N-dioctylaniline and tridecylamine in association with trioctyloxybenzene sulphonic acid. It is shown that the extraction processes at the membrane/solution interface exert the(More)
The influence of the ISE membrane composition on the selectivity for primary, secondary, tertiary, and quaternary alkylammonium cations, as well as for cations of physiologically active amines, has been investigated. Factors studied include the effect of plasticizer (2-nitrophenyl octyl ether, o-NPOE; dibutyl phthalate, DBP; dinonyl adipate, DNA;(More)
This article contains a description of pH-ISEs with plasticised PVC membranes that contain calix[4]arene or p-tertbutylcalix[4]arene as an ionophore and tetradecylammonum nitrate taken in a subequivalent amount relative to calyxarene as an ionic additive. It has been discovered that real ISEs have an extraordinarily wide measuring range which is about 1.5-2(More)
Using the model of ideally associated solution, the effect of ion association of the ion exchanger sites with main and foreign counterions on the selectivity of ISEs based on liquid ion exchangers has been considered. Equations which describe the potentiometric selectivity coefficient as a function of ion association constants in the membrane phase and of(More)
Simple, fast, and theoretically substantiated experimental method for determination of improved selectivity coefficients is proposed. The method is based on the well-known fact that low selectivity coefficients determined by the separate solution method (SSM) are time-dependent and, upon our finding, this dependence is a well-defined linear function of time(More)
Results on the theoretical explanation of the shape of optical bands in polymethine dyes, their dimers and aggregates are summarized. The theoretical dependence of the shape of optical bands for the dye monomers in the vinylogous series in line with a change in the solvent polarity is considered. A simple physical (analytical) model of the shape of optical(More)