Dynamic high-resolution computer simulation of electrophoretic enantiomer separations with neutral cyclodextrins as chiral selectors.

Breadmore, Michael C; Kwan, Hiu; Caslavsky, Jitka; Thormann, Wolfgang (2012). Dynamic high-resolution computer simulation of electrophoretic enantiomer separations with neutral cyclodextrins as chiral selectors. Electrophoresis, 33(6), pp. 958-969. Wiley-VCH 10.1002/elps.201100472

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GENTRANS, a comprehensive one-dimensional dynamic simulator for electrophoretic separations and transport, was extended for handling electrokinetic chiral separations with a neutral ligand. The code can be employed to study the 1:1 interaction of monovalent weak and strong acids and bases with a single monovalent weak or strong acid or base additive, including a neutral cyclodextrin, under real experimental conditions. It is a tool to investigate the dynamics of chiral separations and to provide insight into the buffer systems used in chiral capillary zone electrophoresis (CZE) and chiral isotachophoresis. Analyte stacking across conductivity and buffer additive gradients, changes of additive concentration, buffer component concentration, pH, and conductivity across migrating sample zones and peaks, and the formation and migration of system peaks can thereby be investigated in a hitherto inaccessible way. For model systems with charged weak bases and neutral modified β-cyclodextrins at acidic pH, for which complexation constants, ionic mobilities, and mobilities of selector-analyte complexes have been determined by CZE, simulated and experimentally determined electropherograms and isotachopherograms are shown to be in good agreement. Simulation data reveal that CZE separations of cationic enantiomers performed in phosphate buffers at low pH occur behind a fast cationic migrating system peak that has a small impact on the buffer composition under which enantiomeric separation takes place.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Service Sector > Institute for Infectious Diseases > Laboratory for Clinical Pharmacology

UniBE Contributor:

Kwan, Hiu; Caslavsky, Jitka and Thormann, Wolfgang

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0173-0835

Publisher:

Wiley-VCH

Language:

English

Submitter:

Wolfgang Thormann

Date Deposited:

04 Jul 2014 09:33

Last Modified:

09 Dec 2014 01:31

Publisher DOI:

10.1002/elps.201100472

PubMed ID:

22528416

Uncontrolled Keywords:

Chiral separation, Enantiomer, Isotachophoresis, Simulation

BORIS DOI:

10.7892/boris.54332

URI:

https://boris.unibe.ch/id/eprint/54332

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