The concentration of sulfur dioxide has been measured in the ultraviolet spectral range with a combination of the differential optical absorption technique and Fourier transformation. Measurements have been made with a pathlength of two meters and a measuring time of one minute. Sulfur dioxide levels of less than 0.1 ppm (volume) were assessed with a measurement uncertainty of ±0.03 ppm (volume). This method also shows good robustness against displacements in the wavelength range of the incoming absorption spectrum.
EdnerH.SunessonA.SvanbergS.UnéusL. and WallinS, Appl. Opt.25, 403 (1986).
2.
PlattU. and PernerD, “Measurement of Atmospheric Trace Gases by Longpath Differential UV/Visible Absorption Spectroscopy,” in Optical and Laser Remote Sensing, KillingerD. K. and MooradianA, Eds. (Springer, Berlin, 1983), Vol. 39, p. 97.
3.
IzumiT. and NakamuraK, Anal. Chem.53, 782 (1981).
4.
BendatJ. S. and PiersolA. G, RANDOM DATA: Analysis and Measurement Procedures (Wiley-Interscience, New York, 1971).
5.
HarrisF. J., Proc. IEEE66, 51 (1978).
6.
HallstadiusH.UnéusL. and WallinS, SPIE1433, 36 (1991).
