Abstract

Critical micelle concentrations and surface properties of the amphiphilic antidepressant drugs imipramine, clomipramine and desipramine hydrochlorides in different aqueous media, i.e. water and 0.05 mol kg-1 NaCl and a buffered solution of pH 4.0 and at a temperature of 298.15 K, were determined by surface tension measurements. A mass action model, modified for application to association systems of low aggregation number, was used to calculate the standard Gibbs energy of micellization, \(\Delta G_m^0 \). The standard Gibbs energy of adsorption, \(\Delta G_{ads}^0 \), was also obtained.

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