Measurements of Atmospheric Trace Gases by Long Path Differential UV/Visible Absorption Spectroscopy
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Absorption spectroscopic measurement methods for trace gas analysis have a number of clear advantages over sampling methods, including absence of wall losses, greater specificity and the potential for real time measurements of several different species with a single type of instrument. Nonetheless, only a relatively small number of spectroscopic measurements of atmospheric trace gases have been reported in the past, using infrared or UV/visible absorption spectroscopy (Hanst 1971, Tuazon et al. 1981, Connell et al. 1980, Noxon et al. 1980, 1981, Bonafé et al. 1976, Millán et al. 1978).
KeywordsLight Path Exit Slit Wall Loss Light Path Length HONO Absorption
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