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Ratiometric oxygen sensing: detection of dual-emission ratio through a single emission filter
Y Kostov1, P Harms, R S Pilato
1Medical Biotechnology Center, University of Maryland Biotechnology Institute, Baltimore 21201, USA.
The Analyst
|August 10, 2000
Abstract:
A new method and device for the ratiometric measurement of oxygen concentration are presented. They are based on the use of a dual-emission oxygen-sensitive dye. The method allows the exclusion of the influence of emission overlap. The detection of the dual-emission ratio is performed using a single long-pass emission filter. The device described is simpler than the widely used lifetime instruments and could easily be a stand-alone low-cost instrument.