DETERMINATION OF TITANIUM, ZIRCONIUM, NIOBIUM, AND TANTALUM IN STEELS: SEPARATIONS BY ANION-EXCHANGE
A procedure is described for the determination of titanium, zirconium, niobium, and tantalum in steel. These elements are concentrated by selective precipitation with cupferron from a hydrochloric acid solution of the sample, and then igni-ted to the oxides. The oxides are fused, and dissolved in a hydrochlorichydrofluoric acid mixture. Three separate eluates, containing titanium and zirconium, niobium, and tantalum, result from elution with mixtures containing ammonium chloride, hydrochloric acid, and hydrofluoric acid from a column of Dowex-1 anion-exchange resin. Boric acid is added to the eluates to complex the hydrofluoric acid, and the elements are precipitated with cupferron. Titanium is determined by the hydrogenperoxide method, and zirconium by the phosphategravimetric method. Niobium and tantalum are determined by the hydroquinone- and pyrogallol-photometric methods, or by weighing the oxides. (auth)
- Research Organization:
- Originating Research Org. not identified
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-13-007529
- OSTI ID:
- 4253686
- Journal Information:
- J. Research Natl. Bur. Standards, Journal Name: J. Research Natl. Bur. Standards Vol. Vol: 62
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ALCOHOLS
AMINES
ANIONS
BENZENE
BORON COMPOUNDS
CHEMICAL REACTIONS
CHEMISTRY
CHLORIDES
COMBUSTION
CUPFERRON
ENRICHMENT
FLUORIDES
HYDROCHLORIC ACID
HYDROGEN PEROXIDES
ION EXCHANGE
ION EXCHANGE MATERIALS
MELTING
NIOBIUM
OXIDES
PHOSPHATES
PHOTOMETRY
PRECIPITATION
QUANTITATIVE ANALYSIS
QUINONES
RESINS
SEPARATION PROCESSES
SOLUTIONS
STEELS
TANTALUM
TITANIUM
WEIGHT
ZIRCONIUM