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Titolo: CALCULATION OF THE COMPOSITION OF SAMPLE ZONES IN CAPILLARY ZONE ELECTROPHORESIS .1. MATHEMATICALMODEL
Autore: BECKERS JL;
 Indirizzi:
 EINDHOVEN UNIV TECHNOL,INSTRUMENTAL ANAL LAB,POB 513 5600 MB EINDHOVEN NETHERLANDS
 Titolo Testata:
 Journal of chromatography
fascicolo: 2,
volume: 693,
anno: 1995,
pagine: 347  357
 Fonte:
 ISI
 Lingua:
 ENG
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Science Citation Index Expanded
 Citazioni:
 12
 Recensione:
 Indirizzi per estratti:



 Citazione:
 J.L. Beckers, "CALCULATION OF THE COMPOSITION OF SAMPLE ZONES IN CAPILLARY ZONE ELECTROPHORESIS .1. MATHEMATICALMODEL", Journal of chromatography, 693(2), 1995, pp. 347357
Abstract
A mathematical model was set up for the calculation of all parametersin sample zones in capillary zone electrophoresis. In this model, sample peaks are divided into small segments with varying sample component concentrations and all parameters of a segment can be calculated from the parameters of the preceding segment with a steadystate model, based on the mass balances of the co and counter ions, the electroneutrality equation and the modified Ohm's law. In this way, nansteadystate electrophoretic processes can be estimated by a repeated application of a steadystate model. Although in this model only the electrodispersive effect is considered and other peak broadening effects, such as diffusion, are neglected, this model is very useful to obtain an insight into the electrophoretic separation procedure and to calculate how parameters change in a sample zone. Calculations with this model show that linear relationships are obtained between the concentration of the sample component and other parameters, such as the pH, concentrations of co and counter ions, electric field strength and specific resistance in the sample zone, if the sample concentration is not extremely high. With this model electropherograms can be simulated on a spatial basis whereby an possible detector signals can be calculated. The combined effect of a change in pH, resulting in a change in effective mobility for weak acids and bases, and a change in the electric field strength leads to a change in the apparent mobility of the different segments of the sample peaks. For sample ions, both anions and cations, with a mobility higher than that of the coions of the background electrolyte a diffuse front side results from the calculations whereas tailing peaks are obtained for sample components with low mobilities.
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Documento generato il 26/09/20 alle ore 02:08:23