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mean free path, λ mean life, τ

mean interstitial velocity of the carrier gas

in chromatography
The interstitial velocity, u of the carrier gas multiplied by the pressure-gradient correction-factor, j:
u ̄ = u j
u ̄ = F j ɛ I
where F is the nominal linear flow, ɛ I is the interstitial fraction.
Source:
Orange Book, p. 103
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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. doi:10.1351/goldbook.
Last update: 2011-10-11; version: 2.3.
DOI of this term: doi:10.1351/goldbook.M03779.
Original PDF version: http://www.iupac.org/goldbook/M03779.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.
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