Diode laser spectrometer for monitoring up to five atmospheric trace gases in unattended operation

Journal Article · Fri Sep 01 00:00:00 EDT 1989 · Applied Optics; (USA)

DOI:https://doi.org/10.1364/AO.28.003665· OSTI ID:5646082

Schmidtke, G; Kohn, W; Klocke, U; Knothe, M; Riedel, W J; Wolf, H ^[1]

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1. Fraunhofer-Institut fuer Physikalische Messtechnik, Heidenhofstrasse 8, D-7800 Freiburg, Federal Republic of Germany (DE)

An automated diode laser spectrometer for recording concentrations of trace gases is described. It has been tested for unattended operation in the laboratory and at an atmospheric surveillance station for several months. The sensitivities reached are, e.g., 50 ppt for NO{sub 2} and 300 ppt for NO. In an optical path length of 100 m the lowest extinction measured in unattended operation is {similar to}1.5 {times} 10{sup {minus}5} for a measuring time of {similar to}60 s. Recordings of trace gases are shown for urban and rural atmospheric conditions.

• OSTI ID: 5646082
• Journal Information: Applied Optics; (USA), Vol. 28:17; ISSN 0003-6935
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
EARTH ATMOSPHERE
AIR POLLUTION MONITORING
INFRARED SPECTROMETERS
OPERATION
NITRIC OXIDE
NITROGEN DIOXIDE
LASER SPECTROSCOPY
QUANTITATIVE CHEMICAL ANALYSIS
SENSITIVITY
SURVEILLANCE
CHALCOGENIDES
CHEMICAL ANALYSIS
MEASURING INSTRUMENTS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
SPECTROMETERS
SPECTROSCOPY
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)