By R. Grisar, H. Preier, G. Schmidtke, G. Restelli
By now it's been approximately two decades because the pioneering reports on the MIT-Lincoln Laboratories, Lexington, united states, verified the original services of lead salt tunable diode lasers (TDL) for infrared absorption spectroscopy. The growth within the use of TDL instrumentation for a large choice of medical functions was once defined by way of a good number of papers due to the fact, even though, relatively few conferences have been particularly dedicated to this topic. In 1980 the convention on "High solution Infrared Spectroscopy functions and advancements" on the nationwide Bureau of criteria in Gaithersburg, united states, reviewed the state-of-the-art of tunable diode lasers including Fourier remodel Spectroscopy and different laser spectroscopic ideas. 3 years later in 1983 the SPIE convention in San Diego, united states, devoted one assembly to "Tunable Diode Laser improvement and Spectroscopy" functions. It seemed applicable after one more period of 3 years to prepare one other assembly approximately this fast advancing box. In November of 1986 a world Symposium on "Monitoring of Gaseous toxins by means of Tunable Diode Lasers" used to be equipped by means of and held on the Fraunhofer-Insti tut fuer Physikalische Messtechnik in Freiburg, FRG. the most emphasis of this convention was once wear the purposes of TDL ideas to the answer of difficulties of environmental relevance : The dimension of atmospheric hint gases and the tracking of exhaust gases from vehicle and gear plant stack emitters. The kingdom of diode laser improvement and alertness of TDL tools to clinical molecular spectroscopy weren't without delay topics of the meeting.
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Extra info for Monitoring of Gaseous Pollutants by Tunable Diode Lasers: Proceedings of the International Symposium held in Freiburg, F.R.G., 13–14 November 1986
Sample text
We have developed two PA systems with step-tunable 00 and 002 lasers that are used for the detection of gaseous pollutants in environmental air samples. The table below gives a selection of important air pollutants that absorb in the corresponding wavelength ranges. The list oontains many hydrocarbons like ethylene (C2HIt) which is one of the major oonstituents of car exhaust gases, but also species involved in the photochemical smog formation like PAN. 12C1602 _ LaSer 12C160 - Laser Nitric oxide Nitrogen dioxide Peroxiacetylnitrate (PAN) Formaldehyde Ethylene Propylene 1,3-Butadiene Benzene Ammonia Hydrogen nitrate ID ID2 CH30)3ID2 H200 C2HIt C3H6 Clt H6 C6 H6 NH3 HID3 -46- Ethylene Propylene 1,3-Butadiene Benzene Toluene Trichloroethylene Perchloroethylene Ozone Ammonia Phosgene C2HIt C3 H6 Clt H6 C6H6 C7Ha C2HCl 3 C2Cl it 03 NH3 Cl2CO 2.
The table below gives a selection of important air pollutants that absorb in the corresponding wavelength ranges. The list oontains many hydrocarbons like ethylene (C2HIt) which is one of the major oonstituents of car exhaust gases, but also species involved in the photochemical smog formation like PAN. 12C1602 _ LaSer 12C160 - Laser Nitric oxide Nitrogen dioxide Peroxiacetylnitrate (PAN) Formaldehyde Ethylene Propylene 1,3-Butadiene Benzene Ammonia Hydrogen nitrate ID ID2 CH30)3ID2 H200 C2HIt C3H6 Clt H6 C6 H6 NH3 HID3 -46- Ethylene Propylene 1,3-Butadiene Benzene Toluene Trichloroethylene Perchloroethylene Ozone Ammonia Phosgene C2HIt C3 H6 Clt H6 C6H6 C7Ha C2HCl 3 C2Cl it 03 NH3 Cl2CO 2.
Opt. 17, 1806. A. I. (1983). Tunable diode laser system for measuring trace gases in tropospheric air. Environ. Sci. Technol. 17 (8), 352 A Correction, Environ. Sci. Technol. 17 (11), 510 A. S. and GILBERT, R. (1985). A comparison of three methods for measurement of atmospheric nitric and aerosol nitrate and ammonium, Atmospheric Environment 19, 325. I. I. (1986). Measurement of gas phase hydrogen peroxide in air by tunable diode laser spectroscopy, J. Geophys. Res. 91, D 5, 5371. I. I. (1986).