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Correlations between retention volumes and the interfacial tension of the two phases in liquid—liquid chromatography

✍ Scribed by C. Eon; B. Novosel; G. Guiochon

Publisher
Elsevier Science
Year
1973
Tongue
English
Weight
832 KB
Volume
83
Category
Article
ISSN
1873-3778

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✦ Synopsis

It is shown that the interfacial tension between the mobile and the stationary phases reflects the partition properties of the two phases, and this can be taken as a criteria of choice of the systems used in liquid-liquid chromatography. A semi-theoretical treatment shows that the Gibbs free energy of partition of the solute between the two phases is quasi-proportional to the surface tension, pro-'vided that the solubility of each phase in the other is small. Such behaviour is observed with organic solvent-water systems for solvents that give a surface tension greater than 20-25 dynes/cm. As mixtures of mobile phases behave in the same way, the retention times in programmed gradient analysis can be predicted.

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