Mass spectrometric study of rare earth oxide equilibria in the glow discharge

Journal Article · Wed Dec 01 04:00:00 EST 1993 · Analytical Chemistry (Washington); (United States)

DOI:https://doi.org/10.1021/ac00071a001· OSTI ID:7114500

Mei, Y; Harrison, W W ^[1]

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1. Univ. of Florida, Gainesville, FL (United States)

Glow discharge mass spectrometry has been used to study redox equilibria reactions of lanthanum and lanthanum oxide in an argon glow discharge. Introduction of the primary reagents of La and LaO is by sputter ejection from a cathodic sample. The plasma chemistry is greatly affected by oxidizing and reducing agents in the plasma, most prominent of which is residual water, shown here to reduce greatly the La/LaO ratio even at trace levels of water vapor. The injection of controlled amounts of water vapor was used to demonstrate this effect. Mixtures of Ar and Ne permitted the study of atomization changes for Ag, Ti, and La samples. [sup 18]O-enriched water was also used to follow oxidation processes in the plasma. Attempts were made to differentiate between oxygen reactants arising from sputtered oxide sample and those originating in the injected water. 32 refs., 8 figs.

• OSTI ID: 7114500
• Journal Information: Analytical Chemistry (Washington); (United States), Journal Name: Analytical Chemistry (Washington); (United States) Vol. 65:23; ISSN 0003-2700; ISSN ANCHAM
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400100* -- Analytical & Separations Chemistry
400201 -- Chemical & Physicochemical Properties
ARGON
ATOMIZATION
CATHODES
CHALCOGENIDES
CHEMICAL REACTIONS
ELECTRIC DISCHARGES
ELECTRODES
ELEMENTS
EQUILIBRIUM
EVEN-EVEN NUCLEI
FLUIDS
GASES
GLOW DISCHARGES
ISOTOPES
LANTHANUM
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LIGHT NUCLEI
MASS SPECTRA
METALS
NEON
NONMETALS
NUCLEI
OXIDES
OXYGEN
OXYGEN 18
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
PLASMA
RARE EARTH COMPOUNDS
RARE EARTHS
RARE GASES
REDOX REACTIONS
SILVER
SPECTRA
SPUTTERING
STABLE ISOTOPES
TITANIUM
TRANSITION ELEMENTS
VAPORS
WATER VAPOR