The degree to which a property or a constituent
is uniformly distributed throughout a quantity of material. A material may be homogeneous
with respect to one analyte or property but heterogeneous with respect to another.
The degree of heterogeneity (the opposite of homogeneity) is the determining factor
of sampling error
PAC, 1990, 62, 1193
(Nomenclature for sampling in analytical chemistry (Recommendations 1990))
on page 1201
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