Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Why robust background electrolytes containing multivalent ionic species can fail in capillary zone electrophoresis
Autore:
Beckers, JL; Gebauer, P; Bocek, P;
Indirizzi:
Acad Sci Czech Republ, Inst Analyt Chem, CZ-61142 Brno, Czech Republic Acad Sci Czech Republ Brno Czech Republic CZ-61142 Brno, Czech Republic Eindhoven Univ Technol, Dept Chem SPO, NL-5600 MB Eindhoven, Netherlands Eindhoven Univ Technol Eindhoven Netherlands NL-5600 MB ven, Netherlands
Titolo Testata:
JOURNAL OF CHROMATOGRAPHY A
fascicolo: 1-2, volume: 916, anno: 2001,
pagine: 41 - 49
Fonte:
ISI
Lingua:
ENG
Soggetto:
PREDICTING PEAK SYMMETRY; 2 CO-IONS; SYSTEM PEAKS; SAMPLE ZONES;
Keywords:
background electrolyte composition; peak shapes; system peaks; capillary electrophoresis; organic acids;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Bocek, P Acad Sci Czech Republ, Inst Analyt Chem, Veveri 97, CZ-61142 Brno, Czech Republic Acad Sci Czech Republ Veveri 97 Brno Czech Republic CZ-61142 lic
Citazione:
J.L. Beckers et al., "Why robust background electrolytes containing multivalent ionic species can fail in capillary zone electrophoresis", J CHROMAT A, 916(1-2), 2001, pp. 41-49

Abstract

In this paper it is demonstrated that system peaks are induced by multivalent weak ionic species in background electrolytes. Their existence is derived from SystCharts and from Peak Shape Diagrams and the theory is confirmedexperimentally. If analytes are present in a sample, with mobilities approximately equal to the mobility of a system peak, they interact, resulting in a strong increase of electromigration dispersion. This leads to strong peak broadening, peak deformation and a loss of resolution. Typical background electrolytes containing multivalent ionic species, e.g. phosphate and phthalate buffers, often reported to be robust electrolytes, an therefore not always universally applicable and can fail for the application of specific analytes. This paper reports a systematic study of the above phenomena and shows both theoretical and experimental results for background electrolytescontaining phosphoric acid and phthalic acid. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/08/20 alle ore 07:59:31