Multiplexed, Optical Reflectance Data in Chemical Detection

This report describes the hardware for a prototype sensor system and a processing algorithm developed for application with time dependent, reflectance color values obtained using that device. The system utilizes paper supported porphyrin and metalloporphyrin indicators for chemical detection. Here, we explain the event identification algorithm, variations for application of the algorithm in real-time, and potential adjustments to improve sensitivity and selectivity in the output. The described algorithm has been developed with a view toward minimizing the processing power necessary to facilitate its application onboard highly miniaturized sensor devices. The goal is to develop devices that can be utilized as part of a highly distributed chemical sensing network.