P1.9.28 Contactless Conductivity Detector in PDMS Microfluidic System

Event
14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany
Chapter
P1.9 Technology and Application
Author(s)
K. Blaszczyk, M. Chudy, Z. Brzozka, A. Dybko - Department of Microbioanalytics, Faculty of Chemistry, Warsaw University of Technology (Poland)
Pages
1246 - 1248
DOI
10.5162/IMCS2012/P1.9.28
ISBN
978-3-9813484-2-2
Price
free

Abstract

We present a new contactless conductivity detector for microfluidic system. In traditional conductivity detectors, the electrodes are in direct contact with analyte. In the presented microsystem, the electrodes are made of microchannels filled with solution of KCl - the technological solution called as pseudoelectrodes. Microfluidic system was fabricated in poly(dimethylsiloxane) PDMS, during a photolithography process. During the tests, dimension, type of the filling electrolyte and lay-out of pseudoelectrodes' microchannels were evaluated. Analyte was pumped into microchannels using a syringe pump. Repeatable changes in the signal were observed.

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