Year: 2010
Type: conference-paper
Abstract: Nowadays, air pollution is presented as a serious threat to the planet. The concentration of gases from anthropogenic activities, such as transport, cause consequences ranging from local to global scale, affecting the climate, the environment and the human health. It is necessary to detect and monitor of a large number of gas species emitted by these sources of pollutants. The photothermal techniques, specially photoacoustic spectroscopy, allow the detection of many gaseous species. In this work, it is presented a new detection limit for a photoacoustic spectrometer composed of a CO 2 Laser and a Photoacoustic Resonant Cell. Analyses of many gas samples collected in the exhaust of urban buses in the city were performed. Ethylene was detected with the help of the CO 2 Laser photoacoustic spectroscopy and concentrations of CO, CO 2 and NO were obtained through a commercial infrared photoacoustic analyzer called URAS.
Institution: State University of Norte Fluminense
Language: English
Subfield: Spectroscopy
Field: Chemistry
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2016004166