reduced adsorption

Of component $i$ , defined by the equation

$Γ i n = Γ i σ − Γ i c i α − c i β c α − c β$

where $Γ σ$ , $c α$ and $c β$ are, respectively, the total Gibbs surface concentration and the total concentrations in the bulk phases α and β:

$Γ σ = ∑ i Γ i σ$

$c α = ∑ i c i α$

$c β = ∑ i c i β$

The reduced adsorption is invariant to the location of the Gibbs surface. Alternatively, the reduced adsorption may be regarded as the Gibbs surface concentration of $i$ when the Gibbs surface is chosen so that $Γ σ$ is zero, i.e. the Gibbs surface is chosen so that the reference system has not only the same volume, but also contains the same total amount of substance( $n$ ) as the real system.

Source:

PAC, 1972, 31, 577 (Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry) on page 591

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Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook.

Last update: 2014-02-24; version: 2.3.3.

DOI of this term: https://doi.org/10.1351/goldbook.R05212.

Original PDF version: http://www.iupac.org/goldbook/R05212.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.

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