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Effect of pressure drop across the column on average densities and capacity factors in supercritical fluid chromatography

โœ Scribed by Keith D. Bartle; Terry Boddington; Anthony A. Clifford; Gavin F. Shilstone

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
780 KB
Volume
471
Category
Article
ISSN
1873-3778

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โœฆ Synopsis

Calculations have been carried out of the average densities and capacity factors in supercritical fluid chromatographic (SFC) columns, taking into account the effect of the pressure drop along the column using, as examples, carbon dioxide as the mobile phase and phenanthrene as the solute. The values obtained were compared with those predicted for the mean pressure in the column. Differences are found which can be substantial for both the density and the capacity factor. Maximum deviations are found to move to higher pressures as the temperature rises. The effect of pressure drop needs to be taken into account by those using SFC to make quantitative measurements.

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