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Proceedings Paper

Portable long open-path FTIR applied to in-situ measurement of trace gases of ambient air pollution
Author(s): Tai-Ly Tso; Wen-Chung Liao; Shih-Yi Chang
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Paper Abstract

A long open path Fourier-transform infrared (FTIR) system operable at pathlengths up to 1 kilometer has been constructed for the simultaneous detection and measurement of trace pollutant gases in the Taiwan urban air. Good mid-IR spectra at 0.5 cm1 resolution covering most pollutant gases of greater than a few ppbv are recored hourly on full 24 hours bases. The spectral absorptions in the region due to HCOOH, C2H4, H2CO and O3 are investigated. A good correlation among HCOOH, C2H4. and 03 is found. On the basis of the kinetics rate information, most formic acid is not formed directly through the oxidation of C2H4. by O3 in the environment of high humidify. This organic acid in the urban air is the dominant form.

Paper Details

Date Published: 1 May 1992
PDF: 12 pages
Proc. SPIE 1637, Environmental and Process Monitoring Technologies, (1 May 1992); doi: 10.1117/12.59328
Show Author Affiliations
Tai-Ly Tso, National Tsing Hua Univ. (Taiwan)
Wen-Chung Liao, National Tsing Hua Univ. (Taiwan)
Shih-Yi Chang, National Tsing Hua Univ. (Taiwan)

Published in SPIE Proceedings Vol. 1637:
Environmental and Process Monitoring Technologies
Tuan Vo-Dinh, Editor(s)

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