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Abstract
AbstractIn this article we explore the kinetics of adsorption of octanoic acid at the mercury‐water interface using phase sensitive AC voltammetry. These measurements were performed before and after stepwise purification of the octanoic acid solution, in order to distinguish between the adsorption behavior of the octanoic acid and its impurities. The adsorption of both octanoic acid and the surface active impurities decrease the capacitance with time. Removing the latter during the purification procedure results in a faster achievement of the equilibrium state and in higher capacitance values. The adsorption was also studied at the air‐water interface using dynamic surface tension measurements. Comparable results are obtained for both interfaces.
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