in diameter. These generally are the most numerous among all particles in the air.
Their concentrations can be determined with the Aitken counter which measures total
particle number density
. Owing to their small size, Aitken particles contribute little to the total mass
concentration of all aerosol
particles; this is determined primarily by particles of diameter
PAC, 1990, 62, 2167
(Glossary of atmospheric chemistry terms (Recommendations 1990))
on page 2173
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. doi:10.1351/goldbook