The change of
interfacial tension caused by addition of a given species to a base solution. When an area of liquid
covered with a spread substance is separated from a clean area of surface by a mechanical
barrier, the force acting on unit length of the barrier is called the surface pressure,
or
,
and is equal to
where
is the
surface tension of the
clean surface and
that of the covered surface.
Source:
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.
