Ultra-trace Analysis of Enantiomeric Impurities in Proteinogenic N-Fmoc-Amino-acid Samples on Cinchona Alkaloid-based Chiral Stationary Phases
The enantiomeric purity of Nα-Fmoc-protected amino acids is crucial from the viewpoint of peptide synthesis; therefore, a sensitive high-performance liquid chromatographic protocol was developed for the identification and quantification of enantiomeric impurities of commercially available Nα-Fmoc-pr...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
| Megjelent: |
2016
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| Sorozat: | ISRAEL JOURNAL OF CHEMISTRY
56 No. 11-12 |
| doi: | 10.1002/ijch.201600058 |
| mtmt: | 3154879 |
| Online Access: | http://publicatio.bibl.u-szeged.hu/10458 |
| Tartalmi kivonat: | The enantiomeric purity of Nα-Fmoc-protected amino acids is crucial from the viewpoint of peptide synthesis; therefore, a sensitive high-performance liquid chromatographic protocol was developed for the identification and quantification of enantiomeric impurities of commercially available Nα-Fmoc-protected amino acids on Cinchona alkaloid quinine- and quinidine-based weak anion exchanger-type chiral stationary phases. In the course of the evaluation of the chiral chromatographic method, the effect of the mobile phase composition, nature, and concentration of different additives were optimized. The specific phenomenon that quinine- and quinidine-based chiral stationary phases behave as pseudo-enantiomers permits that the sequence of elution of the enantiomers might be reversed by simple column switching. This is quite advantageous as regards the separation of the minor component in the presence of the major one. The method developed permits detection of less than 0.01 % enantiomeric impurity in the presence of the major enantiomer. © 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim |
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| Terjedelem/Fizikai jellemzők: | 1042-1051 |
| ISSN: | 0021-2148 |