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Capacitively coupled contactless conductivity detection with dual top-bottom cell configuration for microchip electrophoresis

Mahabadi, K. A. and Rodriguez, I. and Lim, C. Y. and Maurya, D. K. and Hauser, P. C. and de Rooij, N. F.. (2010) Capacitively coupled contactless conductivity detection with dual top-bottom cell configuration for microchip electrophoresis. Electrophoresis, Vol. 31, H. 6. pp. 1063-1070.

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Official URL: http://edoc.unibas.ch/dok/A5841729

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Abstract

An optimized capacitively coupled contactless conductivity detector for microchip electophoresis is presented. The detector consists of a pair of top bottom excitation electrodes and a pair of pickup electrodes disposed onto a very thin plastic microfluidic chip The detection cell formed by the electrodes is completely encased and shielded in a metal housing These approaches allow for the enhancement of signal coupling and extraction from the detection cell that result in an improved signal-to-noise-ratio and detection sensitivity The improved detector performance is illustrated by the electrophoretic separation of six cations (NH4+, K+, Ca2+, Na+, Mg2+, Li+) with a detection limit of approximately 0.3 mu M and the analysis of the anions (Br-, Cl-, NO2-, NO3-, SO42, F-) with a detection limit of about 0 15 mu M. These LODs are significantly improved compared with previous reports using the conventional top top electrode geometry The developed system was applied to the analysis of ions in bottled drinking water samples
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Analytische Chemie (Hauser)
UniBasel Contributors:Hauser, Peter C. P. C.
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Wiley-VCH
ISSN:0173-0835
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:14 Sep 2012 07:19
Deposited On:14 Sep 2012 06:56

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