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Original Articles

SALT EFFECTS ON THE RETENTION OF PEPTIDES IN HYDROPHOBIC INTERACTION CHROMATOGRAPHY

, , , &
Pages 2963-2978 | Received 01 Nov 1999, Accepted 21 Dec 1999, Published online: 06 Feb 2007
 

Abstract

This study investigated the effects of salt in a SynChropak column using peptides which are structurally simpler than proteins. Contrary to the established explanation of salt type by molal surface tension increment, the study attempted to explain salt effects by two retention parameters, S and log kw. S was considered to be related to surface tension effect, log kw to salting in effect. From the dependence of S and log kw on temperature and the stationary phase ligand type, these parameters turned out to be useful in explaining the characteristics of hydrophobic interaction chromatography (HIC) which are different from those of reversed phase chromatography (RPC).

We examined enthalpy-entropy compensation because of the similar tendency of enthalpic and entropic values in the retention process. The uses and characteristics of five different salts were also discussed.

ACKNOWLEDGMENT

This investigation was supported by the Center for Molecular Catalysis (KOSEF).

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