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research article

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

Mahabadi, Kambiz A.
•
Rodriguez, Isabel
•
Lim, Chee Y.
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2010
Electrophoresis

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

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Type
research article
DOI
10.1002/elps.200900578
Web of Science ID

WOS:000276807300011

Author(s)
Mahabadi, Kambiz A.
•
Rodriguez, Isabel
•
Lim, Chee Y.
•
Maurya, Devendra K.
•
Hauser, Peter C.
•
de Rooij, Nico F.  
Date Issued

2010

Publisher

Wiley-Blackwell

Published in
Electrophoresis
Volume

31

Start page

1063

End page

1070

Subjects

Capacitively coupled contactless conductivity detection

•

Contactless conductivity detection

•

Microchip electrophoresis

•

Capillary-Electrophoresis

•

Electrochemical Detection

•

Devices

•

Microfluidics

•

Systems

•

Achievements

•

Fabrication

•

Geometry

•

Lithium

Peer reviewed

NON-REVIEWED

Written at

EPFL

EPFL units
SAMLAB  
Available on Infoscience
May 5, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/49937
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