Portable Lab-on-a-Disc system integrating photo-switchable micro-valves for in-situ aquatic environmental monitoring
Czugala, Monika and Maher, Damien and Burger, Robert and Fraser, Kevin J. and Ducrée, Jens and Diamond, Dermot and Benito-Lopez, Fernando (2012) Portable Lab-on-a-Disc system integrating photo-switchable micro-valves for in-situ aquatic environmental monitoring. In: 16th International Conference on Miniaturized Systems for Chemistry and Life Sciences, µTAS 2011 (MicroTAS) Conference, 28 Oct - 1 Nov 2012, Okinawa, Japan.
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This work describes the first use of a portable centrifugal microfluidic analysis system (CMAS) for on-site lab-on-a-disc water quality monitoring. The centrifugal microfluidic platform designed for the detection of nitrite in multiple water samples incorporates photo-switchable microvalves, which are easily controlled using white light irradiation. Calibration of the CMAS system resulted in a linear response that obeys the Beer-Lambert Law. Excellent correlation of results between the CMAS device and a standard UV-Vis spectrophotometer were obtained.
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