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Titolo:
Theoretical migration model for micellar capillary electrophoresis and itsapplication to the separation of anionic metal complexes of HEDTC and CDTA
Autore:
Breadmore, MC; Macka, M; Haddad, PR;
Indirizzi:
Univ Tasmania, Hobart, Tas 7001, Australia Univ Tasmania Hobart Tas Australia 7001 ania, Hobart, Tas 7001, Australia
Titolo Testata:
ANALYTICAL CHEMISTRY
fascicolo: 9, volume: 71, anno: 1999,
pagine: 1826 - 1833
SICI:
0003-2700(19990501)71:9<1826:TMMFMC>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
PERFORMANCE LIQUID-CHROMATOGRAPHY; ELECTROKINETIC CHROMATOGRAPHY; BIS(2-HYDROXYETHYL)DITHIOCARBAMATE COMPLEXES; UV DETECTION; BEHAVIOR; OPTIMIZATION; SURFACTANT; MEDIA; IONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Haddad, PR Univ Tasmania, GPO Box 252-75, Hobart, Tas 7001, Australia UnivTasmania GPO Box 252-75 Hobart Tas Australia 7001 ustralia
Citazione:
M.C. Breadmore et al., "Theoretical migration model for micellar capillary electrophoresis and itsapplication to the separation of anionic metal complexes of HEDTC and CDTA", ANALYT CHEM, 71(9), 1999, pp. 1826-1833

Abstract

A mathematical model relating the effective mobility of an analyte in micellar capillary electrophoresis (MCE) to the concentration of surfactant andorganic modifier in the background electrolyte (BGE) was derived. Effective mobility is expressed in terms of the electrophoretic mobility of the analyte, the partition coefficient of the analyte into the micelle, and the influence of organic modifier on these two factors. The performance of the model was evaluated using Cd(II), Pb(II), Co(II), Ni(II), Bi(III), Cu(II), and Hg(II) complexes of bis(2-hydroxyethyl)dithiocarbamate, all of which carry a partial negative charge, and Cd(II), Pb(II), Co(II), Ni(II), Bi(III), Cu(II), Hg(II), Fe(III), Ag(I), Tl(I), and Mn(II) complexes of trans-1,2-diaminocyclohexane-N,N,N',N'-tetracetic acid, all of which are anionic having charges in the range -1 to -3, These analytes were separated in berate BGEscontaining 10-50 mM sodium dodecyl sulfate and 0-20% (V/V) methanol, Nonlinear regression was used to derive parameters for the model from experimental data and these parameters were used to predict effective mobilities of the analytes.Predicted values of effective mobilities agreed with experimental values to within 3.1%. Values of parameters from the model equation are used to explain changes in separation selectivity observed at different BGEcompositions and the model equation is shown to be applicable to computer-assisted optimization of the BGE composition, in MCE using a limited numberof experiments.

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Documento generato il 05/07/20 alle ore 13:33:11