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Separation of amino alcohols using divalent dipeptides as counter ions in aqueous CE
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- Haglöf, Jakob (author)
- Uppsala universitet,Avdelningen för analytisk farmaceutisk kemi
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- Pettersson, Curt (author)
- Uppsala universitet,Avdelningen för analytisk farmaceutisk kemi
- (creator_code:org_t)
- 2010-04-22
- 2010
- English.
- In: Electrophoresis. - : Wiley. - 0173-0835 .- 1522-2683. ; 31:10, s. 1706-1712
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Divalent dipeptides have been introduced as counter ions in aqueous CZE. The dipeptides form ion pairs with amino alcohols in the BGE and facilitate the separation of amino alcohols. High concentrations of dipeptide caused reversed effective mobility for the analytes. The net charge of the dipeptide can be controlled using a buffer or a strong base, and regulates the interaction between the dipeptide and the amino alcohol. A stronger interaction and higher selectivity of amino alcohols was observed when the dipeptides were used as divalent counter ions, than in monovalent or uncharged form. Association constants for ion pairs between divalent dipeptides and amino alcohols can be used to enhance selectivity for amino alcohols in CZE. No chiral separation of amino alcohols was observed when using the dipeptides as ion-pairing chiral selectors in aqueous BGE, but addition of methanol to the BGE promoted enantioselectivity.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Läkemedelskemi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Medicinal Chemistry (hsv//eng)
Keyword
- Association constants
- CE
- divalent counter ion
- Ion-pair formation
- reversed mobility
- Pharmaceutical chemistry
- Farmaceutisk kemi
- Analytical Pharmaceutical Chemistry
- Analytisk farmaceutisk kemi
Publication and Content Type
- ref (subject category)
- art (subject category)
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