Phosphorescence and Transmission Measurements for Chemical Quantification with Consumer Optoelectronic Products

Two kinds of consumer optoelectronic products were used for chemical quantification to demonstrate the feasibility of a simple analytical method. A light panel with light-emitting diode (LED) backlight was used as the illumination source for transmission measurement to quantify humidity and as the excitation source for luminescence to quantify oxygen. The recognition agents for oxygen and humidity were platinum porphyrin complex (PtOEP) luminophore and cobalt chloride chromophore, respectively. Optical sensor plates coated with these agents were prepared to characterize the performance. A color camera served as a photodetector for registering the sensor images and analyzing the oxygen and humidity levels quantitatively. This simple colorimetric approach proves that the consumer optoelectronic products with network connectivity can make effective and economical tools to enable ubiquitous chemical quantification