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Measurement of Sulfur Dioxide with the Differential Optical Absorption Technique Combined with Fourier Transformation

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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.

Keywords: Differential optical absorption; Fourier transform, UV-Vis region; Sulfur dioxide

Document Type: Research Article


Affiliations: Department of Physics and Measurement, Institute of Technology, Linköping University, S-58183 Linköping, Sweden

Publication date: December 1, 1992

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