Analysis of Environmental Pollutants Using a Piezoelectric Crystal Detector

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Abstract
Piezoelectric crystal detectors possess a good potential as sensors in Analytical Chemistry. Their specificity is excellent, provided a highly selective adsorbent layer is placed on the surface of the crystal. Sensitivity is also good, down to parts per trillion levels of atmospheric pollutants are detectable, with a large linear range up to parts per million. Specific detectors have been developed for organophosphorus compounds, toluene in printing plants, dynamite and explosives, CO, SO2, NOx, NH3, HCl and organochlorine compounds. Results on some of these detectors is presented herein.