Akbas, HIscan, MSidim, T2024-06-122024-06-1220001097-3958https://doi.org/10.1007/s11743-000-0117-0https://hdl.handle.net/20.500.14551/18473A proposed method of determining the composition of mixed micelles in equilibrium with monomer of known composition is described. The systems were sodium dodecyl sulfate-polyoxyethylene 23 lauryl ether (Brij 35) in water and in 0.1 M sodium chloride solution at 25 degrees C. This technique applies the Gibbs-Duhem equation to the mixed micelle, which is treated as a pseudophase. This proposed methodology, which needs only critical micelle concentration data as a function of monomer composition, is applied to an anionic/nonionic surfactant pair. The calculated monomer-micelle equilibrium is found to be very similar to the much-used regular solution for nonideal systems.en10.1007/s11743-000-0117-0info:eu-repo/semantics/closedAccessAnionic/Nonionic SurfactantCritical Micelle ConcentrationInteraction ParameterMixed MicelleRegular Solution TheorySurface TensionNonionic SurfactantsSolubilizationArticle317780N/AWOS:0000848056000122-s2.0-0034475079Q3