Abstract
To measure small gas concentrations by absorption spectroscopy, the wavelength of monochromatic light is adjusted to the absorption line of the gas molecule. According to Lambert-Beer’s absorption law, the absorption coefficient K of the gas can then be determined from the ratio of the radiant flux transmitted by the gas sample to the radiant flux without gas.1
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Schimpl, H., Hess, H., Ziegler, A., Brandes, S. (1997). Trace Gas Analysis with Integrating Spheres. In: Fleischhacker, W., Schönfeld, T. (eds) Pioneering Ideas for the Physical and Chemical Sciences. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-0268-9_26
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DOI: https://doi.org/10.1007/978-1-4899-0268-9_26
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