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Separation of aromatic amino acids on β-cyclodextrin polyurethane resins

Authors
Journal
Journal of Chromatography A
0021-9673
Publisher
Elsevier
Publication Date
Volume
208
Issue
1
Identifiers
DOI: 10.1016/s0021-9673(00)87956-x

Abstract

Abstract The chromatographic behaviour of α- and β-cyclodextrin polyurethane resins cross-linked with diisocyanates have been studied using six aromatic amino acids as model compounds and aqueous phosphate buffer solutions of pH 5.5 or 8.2 as eluent. Phenylglycine, tyrosine, trypotophan and phenylalanine can be separated completely, although phenylalanine is very strongly retained. The amino acids are retained more strongly at pH 8.2 than at ph 5.5. The interactions between the cyclodextrin units in the resins and the amino acids are discussed briefly.

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