Abstract
A modified Lippmann electrometer was designed and built and used to obtain electrocapillary curves by varying the concentration of aqueous solutions of quinoline, 2-methylquinoline and 4-methylquinoline, using 1 N KNO 3 as supporting electrolyte. Measurements of surface tension, with the ring method, and surface potential, with the ionizing method, were obtained over the same concentration range at the free solution surface. Comparison was made in terms of the surface excess and the molecular area, between the adsorption behaviour of the organic species at the mercury-solution and air-solution interfaces.
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