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Comparison of the distribution constants of benzene in different chromatographic sorbent-gas systems. Determined by direct measurement of sorption equilibria and calculated from gas chromatographic retention data

Authors
Journal
Journal of Chromatography A
0021-9673
Publisher
Elsevier
Publication Date
Volume
217
Identifiers
DOI: 10.1016/s0021-9673(00)88070-x

Abstract

Abstract The sorbent-gas (nitrogen) distribution constants of benzene on Tenax GC, Porapak Q,P, Apiezon K, QF-1 and Reoplex 400 were determined by direct measurement of sorption equilibria at gas-phase concentrations of benzene ranging from several tens of ppb (10°) to hundreds of ppm. The concentration limits of the linearity of the sorption isotherms for the individual sorbent-systems were estimated, and the limiting distribution constants of benzene, determined by direct measurement of benzene concentrations in the sorbent and in the gaseous phase at concentrations corresponding to linear sections of the isotherms, were compared with the distribution constants calculated from gas chromatographic retention data.

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