A device used for dynamic preparation of test gas mixtures by means of controlled
permeation of a gaseous analyte out of a container through polymer material into a
stream. These devices containing certain condensable gases
etc.) when operated at closely controlled temperatures can be used as primary standards
calibrated in terms of the weight
loss per unit time.
PAC, 1990, 62, 2167
(Glossary of atmospheric chemistry terms (Recommendations 1990))
on page 2205
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