Adsorption of Et4NBr at the mercury/electrolyte interface from water and heavy water solutions

Droptime measurements of aqueous and deuterated Et 4 NBr solutions indicate that the mercury/electrolyte interfacial tension differs by less than 1 mJ m −2 (dyn cm −1 ). Et 4 NBr is slightly more adsorbed from heavy water in dilute solutions, but the difference becomes relatively less important in concentrated electrolytes. This behaviour is interpreted in terms of interfacial transfer parameters and attributed to the nature of the solvent-solute interactions.