Document Detail


Study of electromigration effects on a pH boundary during the on-line electrokinetic preconcentration by capillary electrophoresis.
MedLine Citation:
PMID:  20737445     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
A contribution to the description of electrokinetic effects on the pH boundary formed by sodium borate pH 9.5 and sodium phosphate pH 2.5 electrolytes for on-line preconcentration of weak acids is presented in this article. Simulations of electrokinetic injections together with experimental studies using contactless conductivity detection verified that the preconcentration is induced mainly by dissociation changes of analytes on the pH boundary and transient ITP state. Moreover, a study of the addition of organic solvent to the injection electrolyte was performed with impressive results. Subnanomolar LODs of hydroxybenzoic acids were achieved with 80% of methanol in the injection electrolyte which represents more than 70 000-fold preconcentration in comparison with classical CZE method.
Authors:
Katerina Vítková; Jan Petr; Vítezslav Maier; Joanna Znaleziona; Juraj Sevcík
Related Documents :
14583295 - Spectrophotometric study on the stability of dopamine and the determination of its acid...
16342805 - Determination of pka values by capillary zone electrophoresis with a dynamic coating pr...
12715 - Kinetics of the conformational changes of hemopexin in acid media.
21695 - Properties of d(+)-lysopine dehydrogenase from crown gall tumour tissue.
22061435 - Preservative effect of combinations of acetic acid with lactic or propionic acid on buf...
24383915 - The active site sulfenic acid ligand in nitrile hydratases can function as a nucleophile.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Electrophoresis     Volume:  31     ISSN:  1522-2683     ISO Abbreviation:  Electrophoresis     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-08-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8204476     Medline TA:  Electrophoresis     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  2771-7     Citation Subset:  IM    
Affiliation:
Department of Analytical Chemistry, Faculty of Science, Palacký University in Olomouc, Olomouc, Czech Republic.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Recombinant clotting factor VIII concentrates: Heterogeneity and high-purity evaluation.
Next Document:  Parallel separations using capillary electrophoresis on a multilane microchip with multiplexed laser...