Generation of Polluted Atmospheres for the Calibration of QCM Gas Sensors

Abstract One of the major requirements for developing sensitive and selective detectors based on chemical gas sensors is to generate calibrated polluted atmospheres. In this paper a generation method of volatile organic compounds and explosive vapours is presented. The work was focused on the generation of 4-nitrotoluene (NT), 2,4 and 2,6 dinitrotoluene (DNT), 2,4,6-trinitrotoluene (TNT), toluene and nitromethane vapours. The methodology described in this study was applied to determine the detection limit of a Quartz Crystal Microbalance (QCM)-based sensor.