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Titolo:
Modelling of migration behaviour of inorganic anions in ion-exchange capillary electrochromatography
Autore:
Breadmore, MC; Hilder, EF; Macka, M; Avdalovic, N; Haddad, PR;
Indirizzi:
Univ Tasmania, Sch Chem, Hobart, Tas 7001, Australia Univ Tasmania HobartTas Australia 7001 Chem, Hobart, Tas 7001, Australia Dionex Corp, Sunnyvale, CA USA Dionex Corp Sunnyvale CA USADionex Corp, Sunnyvale, CA USA
Titolo Testata:
ELECTROPHORESIS
fascicolo: 3, volume: 22, anno: 2001,
pagine: 503 - 510
SICI:
0173-0835(200102)22:3<503:MOMBOI>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTROKINETIC CHROMATOGRAPHY; ZONE-ELECTROPHORESIS; SEPARATION PARAMETERS; POLYMER; MOBILITIES;
Keywords:
ion exchange; electrochromatography; packed column; open-tubular column; modelling; optimisation; inorganic anions;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Haddad, PR Univ Tasmania, Sch Chem, GPO Box 252-75, Hobart, Tas 7001, Australia Univ Tasmania GPO Box 252-75 Hobart Tas Australia 7001 ustralia
Citazione:
M.C. Breadmore et al., "Modelling of migration behaviour of inorganic anions in ion-exchange capillary electrochromatography", ELECTROPHOR, 22(3), 2001, pp. 503-510

Abstract

A theoretical model to explain the observed mobility of inorganic anions in capillary electrochromatography (CEC) using ion-exchange (IE) stationary phases has been derived. The model divides contributions to the observed mobility of an analyte ion into capillary electrophoretic (CE) and IE components. The CE component includes the influence of varying the ionic strength of the background electrolyte on the electrophoretic mobility of the analyte, while the IE component accounts for the variation in retention of the analyte ion caused by changing the composition of the background electrolyte. The model was verified using a mixture of UV-absorbing inorganic ions in electrolytes of differing eluotropic strength in both packed and open-tubular CEC systems, with excellent agreement (r(2) > 0.98) for both systems. Values of constants in the model equation determined by nonlinear regression were used to estimate the relative strengths of the interactions of different analytes with the stationary phase and these were found to agree well with elution orders observed in conventional IE chromatography.

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Documento generato il 03/07/20 alle ore 23:06:21