Adsorption-Desorption Studies of Ketones at a Hanging Mercury Drop Electrode by a Flow Injection Method

The adsorption-desorption phenomena of ketones were studied by measuring differential capacity-time curves in a flowing solution. The ketones investigated were acetone, 2-butanone, 3-pentanone and 4-heptanone. The differential capacity-time curves for these ketones showed different shapes with and without peaks. The curves were used to study the adsorption reversibility of the ketones at a mercury electrode. The adsorption of acetone was irreversible and that of 3-pentanone and 4-heptanone was reversible. The adsorption of 2-butanone was rather complicated. It seems that two types of adsorption exist for 2-butanone.