Abstract
By using values ofdσ/dt as criterion for the establishment of the adsorption equilibrium great errors can result for strong surface active substances (gGx/a⩾10−2 cm). A simple linear extrapolation from curves σ or (σ0-σ)−1 on 1/√t (results of dynamic surface tension measurements) can lead to greater errors, too. Conditions are given under which the application of such extrapolation procedures is only possible. To get accurate equilibrium surface tension values of solutions of very strong surfactants (Γx/a>10−1 cm) an extrapolation-interpolation algorithm based on adsorption-desorption measurements is suggested.
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Miller, R., Lunkenheimer, K. On the determination of equilibrium surface tension values of surfactant solutions. Colloid & Polymer Sci 261, 585–590 (1983). https://doi.org/10.1007/BF01526624
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DOI: https://doi.org/10.1007/BF01526624