Figure 1From: Fast responsive, optical trace level ammonia sensor for environmental monitoringAbsorbance and emission spectra of used sensor compositions. a shows the DLR system: absorbance (dotted line) and emission (solid line) spectra of Coumarin 545T (green), Macrolex Fluorsecent Red (red) and the Ruthenium complex (blue) as well as the absorbance spectra for the protonated and deprotonated forms of bromophenol blue (grey areas). b shows the TWR system: absorbance (dotted line) and emission (solid line) spectra of Coumarin 30 (green), Macrolex Fluorsecent Red (red) as well as the absorbance spectra for the protonated and deprotonated forms of bromophenol blue (grey areas).Back to article page