Electromigration dispersion in Capillary Electrophoresis

Details Electromigration dispersion in Capillary Electrophoresis Electromigration dispersion in Capillary Electrophoresis

2012-03-05

arxiv.org/abs/1203.1062v1

Bulletin of Mathematical Biology (2012) Volume 74, Number 2, page 346-355

Physics

Biological Physics

10 pages, 2 figures

Scientific paper

10.1007/s11538-011-9708-7

In a previous paper (S. Ghosal and Z. Chen Bull. Math. Biol. 2010, vol. 72, pg. 2047) it was shown that the evolution of the solute concentration in capillary electrophoresis is described by a nonlinear wave equation that reduced to Burger's equation if the nonlinearity was weak. It was assumed that only strong electrolytes (fully dissociated) were present. In the present paper it is shown that the same governing equation also describes the situation where the electrolytic buffer consists of a single weak acid (or base). A simple approximate formula is derived for the dimensionless peak variance which is shown to agree well with published experimental data.

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