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Effect of alkali me...
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Hedeland, YlvaUppsala universitet,Avdelningen för analytisk farmaceutisk kemi
(author)
Effect of alkali metal hydroxides on the enantioseparation of amines using di-O-isopropylidene-keto-L-gulonic acid as the selector in NACE
- Article/chapterEnglish2006
Publisher, publication year, extent ...
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Wiley,2006
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:uu-94280
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-94280URI
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https://doi.org/10.1002/elps.200600297DOI
Supplementary language notes
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Language:English
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Summary in:English
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Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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The present work demonstrates the importance of the ionic composition in the BGE for enantioseparation. (-)-2,3:4,6-di-O-Isopropylidene-2-keto-L-gulonic acid ((-)-DIKGA) has been used as the chiral selector in methanolic and ethanolic BGEs. The influence of added alkali metal hydroxides on the EOF and the chiral separation of amines; (atenolol, isoprenaline, pindolol and propranolol) have been studied. The ion-pair formation constants in ethanol were determined by precision conductometry for the enantiomers of pindolol with (-)-DIKGA, for Li+, Na+ and Cs+ with (-)-DIKGA, and also for the corresponding alkali metal hydroxides. The effective mobilities and the enantiomeric mobility differences were affected by the type of alkali metal hydroxide (LiOH, NaOH, KOH, RbOH or CsOH) added to the BGE. The effective mobility and mobility difference were increased with decrease in solvated radius of the alkali metal cation. These differences could partly be correlated to the ion-pair formation constants of the alkali metal cations with the chiral selector, affecting the equilibrium concentration of the free selector. The electroosmosis was also affected by the alkali metal hydroxide added to the BGE. The cathodic electroosmosis decreased with decreasing solvated radius of the alkali metal cation added to the BGE. Interestingly, the cathodic EOF was even reversed, i.e. became anodic in the ethanolic BGEs containing KOH, RbOH or CsOH and the methanolic ones with RbOH and CsOH.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Haglöf, JakobUppsala universitet,Avdelningen för analytisk farmaceutisk kemi(Swepub:uu)japet367
(author)
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Beronius, PerUppsala universitet,Avdelningen för analytisk farmaceutisk kemi(Swepub:uu)pbe26324
(author)
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Pettersson, CurtUppsala universitet,Avdelningen för analytisk farmaceutisk kemi(Swepub:uu)curtps
(author)
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Uppsala universitetAvdelningen för analytisk farmaceutisk kemi
(creator_code:org_t)
Related titles
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In:Electrophoresis: Wiley27:22, s. 4469-44790173-08351522-2683
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