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Proceedings Paper

Open-path FTIR measurement of criteria pollutants and other ambient species in an industrial city
Author(s): Robert H. Kagann; C. David Wang; King Lung Chang; Chung Hsun Lu
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Paper Abstract

Recent improvements in signal processing techniques for Open- Path FTIR (OP-FTIR) have resulted in a dramatic reduction of detection limits for infrared active chemicals including ambient species. These lower detection limits opens the open- path FTIR technology to new applications involving monitoring and analyzing ambient air in urban settings. To test application of OP-FTIR technology to urban applications, an RAM2000TM system was used over a seven-day period to measure ambient air-quality in an urban-industrial environment. Several of the ambient species which are ozone precursors and referred to as criteria pollutants in Title I of the Clean Air Act Amendment of 1990, have poor OP-FTIR detection limits because of overlap of their infrared absorption by very strong water vapor lines. Due to the high detection limits for sulfur dioxide and nitrogen dioxide, OP- FTIR has not been the technology of choice for measuring air quality in urban environments. In the present test, we were particularly interested in the improvements in the detection limits of the criteria pollutants, ozone, carbon monoxide, sulfur dioxide and nitrogen dioxide. Improvement in these detection limits will greatly increase the suitability of using OP-FTIR for measuring urban air quality and for measurement programs relating to the USEPA tropospheric ozone- photochemistry studies.

Paper Details

Date Published: 10 February 1999
PDF: 10 pages
Proc. SPIE 3534, Environmental Monitoring and Remediation Technologies, (10 February 1999); doi: 10.1117/12.338993
Show Author Affiliations
Robert H. Kagann, AIL Systems Inc. (United States)
C. David Wang, AIL Systems Inc. (United States)
King Lung Chang, Le and Der Co. Ltd. (Taiwan)
Chung Hsun Lu, Le and Der Co. Ltd. (Taiwan)

Published in SPIE Proceedings Vol. 3534:
Environmental Monitoring and Remediation Technologies
Tuan Vo-Dinh; Robert L. Spellicy, Editor(s)

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