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Improved separation of diastereomeric derivatives of enantiomers by a physical network of linear polyvinylpyrrolidone applied as pseudophase in capillary zone electrophoresis
Author(s) -
Schützner Wolfgang,
Caponecchi Gabriele,
Fanali Salvatore,
Rizzi Andreas,
Kenndler Ernst
Publication year - 1994
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.11501501107
Subject(s) - diastereomer , polyvinylpyrrolidone , chemistry , capillary electrophoresis , enantiomer , amino acid , tartaric acid , analyte , selectivity , electrophoresis , chromatography , organic chemistry , catalysis , biochemistry , citric acid
Diastereomeric analytes were separated using capillary zone electrophoresis with polyvinylpyrrolidone as polymeric additive to the buffer solution. As test substances derivatives of D‐ and L‐ α‐amino and α‐hydroxy acids formed by reaction with (+)‐ O,O ′‐diacetyl‐ and (+)− O,O ′‐dibenzoyl‐L‐tartaric anhydride, respectively, were used. The physical network formed by the linear polymer is supposed to act as a kind of pseudophase. It was found that the network affects the mobility of diastereomeric compounds to a different extent, enchancing the selectivity of the system. In nearly all cases of aromatic acids the diastereomer carrying the D‐amino acid was more strongly retained than the L‐isomer, as opposed to the situation with aliphatic acids.