A fluid colloidal
system in which liquid droplets and/or liquid crystals are dispersed in a liquid.
The droplets often exceed the usual limits for colloids
in size. An emulsion is denoted by the symbol O/W if the continuous phase is an aqueous
solution and by W/O if the continuous phase is an organic liquid (an 'oil
'). More complicated emulsions such as O/W/O (i.e. oil droplets contained within aqueous
droplets dispersed in a continuous oil phase) are also possible. Photographic emulsions,
systems, are not emulsions in the sense of this nomenclature.
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 606
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