Laser-induced breakdown spectroscopy of alkali metals in high-temperature gas
Laser-induced breakdown spectroscopy (LIBS) measurements of alkali in the high-temperature exhaust of a glass furnace show an attenuation of the Na and K LIBS signals that correlates with the stoichiometry of the bath gas surrounding the spark. The results are explained as being due to (1) a strong increase in the concentration of atomic Na and K, resulting in neutral line signal absorption by these atoms, and to (2) a change of phase of the major Na- and K-containing species from an aerosol to a gaseous phase when the gas mixture becomes fuel rich, resulting in a reduced LIBSemission intensity. LIBS sampling at lower temperatures, or in a consistently oxidizing environment, or both are suggested strategies for circumventing these difficulties.
- OSTI ID:
- 20853313
- Journal Information:
- Applied Optics, Journal Name: Applied Optics Journal Issue: 18 Vol. 45; ISSN 0003-6935; ISSN APOPAI
- Country of Publication:
- United States
- Language:
- English
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