Application of cinchona-sulfonate-based chiral zwitterionic ion exchangers for the separation of proline-containing dipeptide rotamers and determination of on-column …

Application of cinchona-sulfonate-based chiral zwitterionic ion exchangers for the separation of proline-containing dipeptide rotamers and determination of on-column …

S Wernisch, O Trapp, W Lindner - Analytica chimica acta, 2013 - Elsevier

... Pro·HCl, Arg-Pro (sulfate salt) and Pro-Arg (acetate salt) were commercially available (Bachem,
Bubendorf, Switzerland). ... For the latter peptides, shorter retention times were attributed to stronger
solvation of the ionic interaction sites of selector and peptide in aqueous ...

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