Preferred Label : permeation tube;
IUPAC definition : 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
carrier gas stream. These devices containing certain condensable gases (e.g. NO sub
2 /sub , SO sub 2 /sub , etc.) when operated at closely controlled temperatures
can be used as primary standards calibrated in terms of the weight loss per unit time.;
Origin ID : P04506;
See also
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
carrier gas stream. These devices containing certain condensable gases (e.g. NO sub
2 /sub , SO sub 2 /sub , etc.) when operated at closely controlled temperatures
can be used as primary standards calibrated in terms of the weight loss per unit time.
