Application of Diode Laser Spectroscopy to Quality Control of Industrial Gas Mixtures

Year: 1998

Authors: Mücke R., Werle P., Brenner K.

Autors Affiliation: Fraunhofer Inst. A., Garmisch-Partenkirchen, Germany; Messer Griesheim GmbH, Spezialgase (MG), Duisburg, Germany

Abstract: High-frequency modulation absorption spectroscopy using tunable in the midinfrared spectral region was applied to control the quality of some selected pressurized gas mixtures of industrial origin. The spectrometer was calibrated according to ISO regulations. The measurements on an industrial NO2 calibration gas mixture delivered NO2 concentrations in good agreement to the specified value 260 ppbv ± 5%. In all, except one, commercial 20 ppmv NO calibration gas mixtures tested the NO2 contamination was below the detection limit of 0.2 ppbv. The measurements demonstrate the high performance of the FM-TDLAS technique used, and the high quality of the commercially available NO and NO2 calibration gas mixtures, pointing out the importance of applying proper tubing, gas withdrawal and conditioning techniques in analytical gas phase measurements, too.


Volume: 1998 (1366)      Pages from: 191  to: 200

KeyWords: diode lasers
DOI: 10000000000