A porous material on which solid particles present in air or other fluid which flows
through it are largely caught and retained. Filters are made with a variety of materials:
cellulose and derivatives, glass fibre,
ceramic, synthetic plastics and fibres. Filters may be naturally porous or be made so by
mechanical or other means.
Membrane/
ceramic filters are prepared with highly controlled pore size in a sheet of suitable material
such as polyfluoroethylene, polycarbonate or cellulose
esters. Nylon mesh is sometimes used for reinforcement. The pores constitute 80–85% of the
filter volume commonly and several pore sizes are available for air sampling
(
–
are commonly employed).
Source:
PAC, 1990, 62, 2167
(Glossary of atmospheric chemistry terms (Recommendations 1990))
on page 2188
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.
