| Popis: |
The model of two diffuse layers separated by an inner compact layer proposed in a previous paper [1] for the liquid-liquid interface is tested again on the water-nitrobenzene interface. The sodium bromide and the tetraalkylammonium tetraphenylborate (R+R′−) maintain the ionic strength constant respectively in the aqueous and organic phase and RBr is added to the aqueous phase at different concentrations (R+-tetrabutyl, tetrapropyl, tetraethylammonium). Interfacial tensions and potential differences between the two phases, measured for various concentrations of R+, lead to an electrocapillary curve comparable to the curve obtained with the classical mercury-aqueous solution system. Furthermore, the dipolar potential drop λ is estimated as very nearly zero. |
