Elucidating atomization mechanisms by simultaneous mass spectrometry and atomic absorption spectrometry

Conference · Thu Aug 01 04:00:00 EDT 1985

OSTI ID:5104264

Styris, D L

Mechanisms responsible for atomization of selenium in graphite furnaces and for stabilization that occurs when nickel is added to selenium are investigated by mass analyzing, in real-time, the gaseous species from furnaces heated in vacuum and in atmospheric pressure environments. For the latter case, the analysis is done on a molecular beam formed from free-jet expansion of gases from the furnace. The apparatus for doing this is described. Results from the two experimental techniques, when compared, indicate that the primary loss of selenium at low temperatures is from thermal dissociation of selenium dicarbide. Secondary losses are due to vaporization of the dimer and the oxides. Nickel nitrate inhibits formation of the dicarbide, the dimer and the oxides. Mechanisms that are responsible for these findings are postulated. 23 refs., 4 figs.

• Research Organization: Pacific Northwest Labs., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 5104264
• Report Number(s): PNL-SA-13306; CONF-8509177-1; ON: DE85018527
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104 -- Spectral Procedures-- (-1987)
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTROSCOPY
ATOMIZATION
CHEMICAL REACTION KINETICS
DATA
ELEMENTS
EXPERIMENTAL DATA
HIGH TEMPERATURE
INFORMATION
KINETICS
MASS SPECTROSCOPY
METALS
NICKEL
NUMERICAL DATA
REACTION KINETICS
SELENIUM
SEMIMETALS
SPECTROSCOPY
STABILIZATION
TRANSITION ELEMENTS
VERY HIGH TEMPERATURE