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  Mathematical modelling of adsorption and transport processes in capillary electrochromatography : open-tubular geometry

Paces, M., Kosek, J., Marek, M., Tallarek, U., & Seidel-Morgenstern, A. (2003). Mathematical modelling of adsorption and transport processes in capillary electrochromatography: open-tubular geometry. Electrophoresis, 24(3), 380-389. doi:10.1002/elps.200390048.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-9F73-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-B9FF-2
Genre: Journal Article
Alternative Title : Electrophoresis

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 Creators:
Paces, M.1, Author
Kosek, J.1, Author
Marek, M.1, Author
Tallarek, U.1, Author
Seidel-Morgenstern, A.2, 3, Author              
Affiliations:
1Prague Inst Chem Technol, Dept Chem Engn, Prague Czech Republic, ou_persistent22              
2Physical and Chemical Foundations of Process Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society, ou_1738150              
3Otto-von-Guericke-Universität Magdeburg, External Organizations, ou_1738156              

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Free keywords: adsorption; capillary electrochromatography; coupled transports; electrical double layer; electroosmosis; electrophoresis; nonlinear effects
 Abstract: A mathematical modelling approach for open-tubular capillary electrochromatography is presented. The spatially one- dimensional model takes into account (i) a coupling of (non)linear adsorption of positively or negatively charged analyte molecules (at a negatively charged capillary inner surface) with the equilibrium electrokinetics at this solid- liquid interface, (ii) mobile phase transport by electroosmosis and pressure-driven flow, as well as (iii) transport of species by electrophoresis and molecular diffusion. Under these conditions the local zeta-potential and electroosmotic mobility become a function of the concentration of the charged analyte. The resulting inhomogeneity of electroosmotic flow through the capillary produces a compensating pore pressure as requirement for incompressible mobile phase flow (i.e., for constant volumetric flow along the capillary). The results of the simulations are discussed in view of the surface-to-volume ratio of the capillary lumen, the analyte concentration (in combination with a Langmuir isotherm for the adsorption process), and buffer effects. © 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim [accessed 2013 November 28th]

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Language(s): eng - English
 Dates: 2003
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 13808
DOI: 10.1002/elps.200390048
Other: 35/03
 Degree: -

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Title: Electrophoresis
Source Genre: Journal
 Creator(s):
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Publ. Info: Weinheim, Germany : Verlag Chemie,
Pages: - Volume / Issue: 24 (3) Sequence Number: - Start / End Page: 380 - 389 Identifier: ISSN: 0173-0835
CoNE: https://pure.mpg.de/cone/journals/resource/954925486765