E4 - Measurement of droplet impedance in segmented flow
- 11. Dresdner Sensor-Symposium 2013
2013-12-09 - 2013-12-11
Dreikönigskirche - Haus der Kirche Dresden
- 5. Miniaturisierte analytische Verfahren
- B. Cahill, S. Wiedemeier, G. Gastrock - Institut für Bioprozess- und Analysemesstechnick, Heilbad Heiligenstadt
- 276 - 278
We describe a microfluidic system for the inline contactless measurement of the impedance of droplets in segmented flow. Droplet-based microfluidics has emerged as a widespread microfluidic tool in the last ten years and has found application in chemical and biological reactors. Electrical sensing of droplet conductivity and capacitance allows the analysis of the processes that take place within the droplet. This may be the sensing of discrete objects within the droplet or the sensing of the concentration of a particular quantity in the droplet. We model the impedance of such insulated electrodes and use the model to optimize the electrode system. A system based on a polymer based microfluidic system is in advanced development.