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Equations for an adsorption isotherm and a surface tension isotherm are derived for surfactant molecules capable of forming two-dimensional aggregates in the adsorption layer at a liquid/fluid interface. Experimental surface tension data for decanol and sodium dodecyl sulfate from literature are used for comparison with the equations derived. Agreement between these data and the model is obtained, which suggests a dimer formation in the adsorption layer.
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Fainerman et al. (1996) studied this question.
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