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Titolo:
PEAK SHAPE DISTORTIONS IN THE CAPILLARY ELECTROPHORETIC SEPARATIONS OF STRONG ELECTROLYTES WHEN THE BACKGROUND ELECTROLYTE CONTAINS 2 STRONG ELECTROLYTE CO-IONS
Autore:
WILLIAMS RL; CHILDS B; DOSE EV; GUIOCHON G; VIGH G;
Indirizzi:
TEXAS A&M UNIV,DEPT CHEM COLLEGE STN TX 77843 TEXAS A&M UNIV,DEPT CHEM COLLEGE STN TX 77843 TEXAS A&M UNIV,DEPT COMP SCI COLLEGE STN TX 77843 UNIV TENNESSEE,DEPT CHEM KNOXVILLE TN 37996
Titolo Testata:
Analytical chemistry
fascicolo: 7, volume: 69, anno: 1997,
pagine: 1347 - 1354
SICI:
0003-2700(1997)69:7<1347:PSDITC>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
LARGE SYSTEM PEAKS; ZONE ELECTROPHORESIS; NONLINEAR CHROMATOGRAPHY; OPTIMIZATION; RESOLUTION; PROFILES; BUFFERS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
R.L. Williams et al., "PEAK SHAPE DISTORTIONS IN THE CAPILLARY ELECTROPHORETIC SEPARATIONS OF STRONG ELECTROLYTES WHEN THE BACKGROUND ELECTROLYTE CONTAINS 2 STRONG ELECTROLYTE CO-IONS", Analytical chemistry, 69(7), 1997, pp. 1347-1354

Abstract

A series of 25 mM phosphate buffer background electrolytes were prepared from phosphoric acid and mixtures of lithium hydroxide and tetrabutylammonium hydroxide as pH adjusters and sources of background electrolyte co-ions. These background electrolytes were used for the capillary electrophoretic separation of quaternary ammonium analytes, Abnormally distorted peaks, different from the simple characteristic triangular peaks usually attributed to electromigration dispersion, were observed, In order to understand the origin of the greatly distorted peaks,capillary electrophoretic separations with two co-ion background electrolytes were numerically simulated using a mathematical model of the electrophoretic process, Generalized peak shape rules were derived from the simulations which can be used to predict the shape of the analyte, co-ions, and counterion concentration peaks, as well as the local electric held strength changes. Abnormal peak shape and peak disappearance can occur when the analyte peak and the noncomigrating system peaks overlap.

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Documento generato il 13/08/20 alle ore 14:30:28