| 摘要 |
A method for spectroscopically measuring a concentration of component gases in a gas mixture, wherein at least one component gas A has an absorption line spectrum and wherein the concentration of the gas A in the gas mixture exceeds the concentration of other component gases of the gas mixture to such an extent that measurement of the concentration of the other component gases would normally be interfered with by the gas A. The method includes the following steps: passing a beam of light of continuous spectrum through a measuring cuvette containing the gas mixture; introducing the beam of light from the measuring cuvette into a spectrometer which effects a spectral dispersion; introducing the dispersed light from the spectrometer into a detector; determining the concentration of component gases in the gas mixture from light intensities of absorption lines of the dispersed light sensed by the detector; charging an auxiliary gas cuvette with the gas A in such a concentration as to render the auxiliary gas cuvette light-impervious for wavelengths corresponding to absorption maxima of the gas A; and positioning the auxiliary gas cuvette containing the gas A in the beam of light upstream of the detector.
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