Abstract
Molecular absorption spectra produced by some lithium salts such as lithium chloride, hydroxide and nitrate in the carbon tube atomizer, air-acetylene flame and argon-hydrogen flame were determined in the wavelength range 1900 to 4000 Å.In the air-acetylene and argon-hydrogen flames, the absorption spectra for LiCl were obtained in the 2000-2450 Å region, and the spectra for LiOH were obtained in the 2000-3300 Å region. In the fuel rich hydrogen-air-argon flame, the density of atomic lithium vapor increased.LiCl and NO molecular absorption spectra were obtained in the carbon tube atomizer. An absorption spectrum for NO was observed at about 600°C, the dissociation temperature of lithium nitrate. The absorption spectrum for LiCl was observed at 1350°C, the boiling point of lithium chloride.The absorption spectrum for LiOH was undetectable by lithium hydroxide solution in the carbon tube atomizer.
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