Abstract
The sorption isotherms of benzene in the presence of o-xylene as a co-sorbate were measured in various chromatographic sorbent—nitrogen systems at 35°C. The benzene gas-phase concentration was kept at 0.5 ppm while that of o-xylene was varied within about 0.025–25 ppm. With Tenax GC, Porapak P and Porapak Q as sorbents the partition coefficients of benzene were substantially decreased due to the presence even of about 0.01 ppm o-xylene in the gaseous phase. With Apiezon K and QF-1 liquid sorbents the partition coefficients of benzene remained practically constant up to about 2.5 ppm of o-xylene in the gaseous phase.
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