Estimation of adsorptivity and peak potential shift of related surfactantsand bioactive species based on their electrocapillary and tensammetric behavior

On the basis of connections between interfacial activity of surfactants, th eir electrocapillary activity and adsorptive stripping tensammetry, possibi lities are suggested of the ways of i) comparing interfacial activities of related adsorptive substances; ii) electrocapillary concept of describing t he potential shifts DeltaE(p) of desorption peaks with changing concentrati ons c of surfactants. The comparison or estimation of the electrosorption a ctivity, best for homologous species, was based on evaluation as linear or nonlinear tensammetric current I vs. c dependences. The dependence between DeltaE(p)(2) and 1n c was interpreted in terms of electrocapillary terms an d coefficients. The aqueous electrolyte water solutions containing sodium d odecylbenzenesulfonate, oleic acid, dodecanol, triphenylethylene and monens in were used.