1985-86 measurements with the tunable-diode-laser absorption spectrometer. Final report
Technical Report
·
OSTI ID:6946549
A Tunable Diode Laser Absorption Spectrometer (TDLAS) system has been developed under contract with CRC for measurement of trace substances in the atmosphere. Under a subsequent contract, the repertoire of atmospheric gases that can be measured by this technique was extended to include NH/sub 3/, H/sub 2/O/sub 2/, SO/sub 2/ and HCHO. The system was modified to permit the near simultaneous measurements of two species. This was accomplished by incorporating two separate cold heads, each containing a set of 4 diode lasers. The Unisearch and AES TAMS-2B instruments participated in an HNO/sub 3/ intercomparison study at Claremont CA in September 1985. The TDLAS data agreed within combined uncertainties with the FTIR and denuder difference methods but were lower than filter pack measurements and higher than the annular denuder measurements. The agreement between measurements made by TDLAS, the fluorometric methods and bubbler techniques for H/sub 2/O/sub 2/ was not as good. The results of these measurements are being prepared for publication.
- Research Organization:
- Unisearch Associates, Inc., Concord, Ontario (Canada)
- OSTI ID:
- 6946549
- Report Number(s):
- PB-88-214002/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
420300 -- Engineering-- Lasers-- (-1989)
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION MONITORING
ALDEHYDES
AMMONIA
CHALCOGENIDES
DOCUMENT TYPES
FORMALDEHYDE
HYDRIDES
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
INORGANIC ACIDS
LASER SPECTROSCOPY
NITRIC ACID
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN HYDRIDES
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PEROXIDES
PROGRESS REPORT
SPECTROSCOPY
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
420300 -- Engineering-- Lasers-- (-1989)
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION MONITORING
ALDEHYDES
AMMONIA
CHALCOGENIDES
DOCUMENT TYPES
FORMALDEHYDE
HYDRIDES
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
INORGANIC ACIDS
LASER SPECTROSCOPY
NITRIC ACID
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN HYDRIDES
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PEROXIDES
PROGRESS REPORT
SPECTROSCOPY
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES