The Determination of Adsorption in Ternary Solutions

Abstract

A NUMBER of attempts have been made to determine the adsorption of surface-active substances from solutions containing salts, by the use of the Gibbs' equation, in the form where dρ is the variation of the surface tension caused by a change dμb(= RTd log αB) in the potential of the substance B.1 The complete equation of Gibbs as applied to a ternary system A-B-S is but if the dividing surface up to which the solution is supposed to be perfectly homogeneous is defined so that T = 0, this becomes. This equation reduces to (1) when the variation of μs is negligible in comparison with that of μB. This will be the case when the concentration of B is very small, but will cease to hold at greater concentrations.

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References

  1. 1

    For example, Goard and Rideal, J. Chem. Soc., 127, 1668, 1925; S. Palitzsch, Zeit. physikal. Chem., 147, 51; 1930.

  2. 2

    Proc. Roy. Soc., A 129, 519; 1930.

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BUTLER, J. The Determination of Adsorption in Ternary Solutions. Nature 127, 778–779 (1931). https://doi.org/10.1038/127778a0

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