Optics: measuring and testing – By dispersed light spectroscopy
Patent
1990-12-03
1992-10-13
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
356326, 356437, 250345, G01J 300, G01N 2131
Patent
active
051555450
ABSTRACT:
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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Luft, "Uber einer neue Methode der registrierenden Gasanalyse mit Hilfe der Absorption ultraroter Strahlen ohne spektrale Zerlegung", Zeitschrift fur technische Physik, No. 5, 1943, pp. 97-103.
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Small et al, American Laboratory, vol. 20, Issue 11, 1988, pp. 89-91.
Bernath Atomic GmbH & Co. KG
Keese, II La Charles P.
Kernforschungszentrum Karlsruhe GmbH
McGraw Vincent P.
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