P1.9.28 Contactless Conductivity Detector in PDMS Microfluidic System
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
- P1.9 Technology and Application
- K. Blaszczyk, M. Chudy, Z. Brzozka, A. Dybko - Department of Microbioanalytics, Faculty of Chemistry, Warsaw University of Technology (Poland)
- 1246 - 1248
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.