EMISSION SPECTROMETRIC DETERMINATION OF OXYGEN IN NIOBIUM METAL

Journal Article · Sat Jul 01 04:00:00 EDT 1961 · Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed.

OSTI ID:4041946

Evens, F M; Fassel, V A

The emission spectrometric technique for the determination of oxygen in metals has been extended to the determination of oxygen in niobium. A d.c. carbon-arc discharge is used to extract the oxygen content of the sample as carbon monoxide into a static argon atmosphere. Special electrode assemblies which support a platinum--niobium alloy or provide a critical graphite-niobium relationship are employed. The d.c. carbon arc dissociates the evolved carbon monoxide and the emission spectrum of atomic oxygen is excited. The intensity ratios of O/sub 7772A.//Ar/sub 7891A. and O/sub 7775A.//Ar/sub 7891A./ are related to the oxygen content of the samples. The concentration range from 0.004 to 0.60 weight% can be covered. The preparation and evaluation of synthetic oxygen standards are discussed. (auth)

• Research Organization: Ames Lab., Ames, Iowa
• NSA Number: NSA-15-022263
• OSTI ID: 4041946
• Report Number(s): IS-237; 0003-2700
• Journal Information: Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed., Journal Name: Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed. Vol. Vol: 33; ISSN ANCHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ARGON
ATMOSPHERE
ATOMS
CARBON
CARBON MONOXIDE
CHEMISTRY
ELECTRIC ARCS
ELECTRIC DISCHARGES
ELECTRODES
EMISSION
GRAPHITE
METALS
NIOBIUM
NIOBIUM ALLOYS
OXYGEN
PLATINUM ALLOYS
PREPARATION
QUANTITATIVE ANALYSIS
SPECTRA
SPECTROMETERS
STANDARDS