Abstract
Summary Electrocapillary curves for aqueous tetramethylammonium fluoride, chloride, bromide and iodide solutions have been obtained over a wide concentration range by a dynamic drop-time technique. Esin-Markov plots and ionic surface excesses are presented. Adsorption in excess of the Gouy-Chapman theory is generally observed at higher concentrations at the mercury surface increasing in the order F − − − − . Analysis of surface excesses by considering separately the specific adsorption of anions or cations leads to incongruent components of charge. A model based on the ion-ion interactions rather than ion-electrode interactions is proposed to explain these results.
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