DETERMINATION OF NIOBIUM AND TANTALUM IN TITANIUM-BASE ALLOYS

Journal Article · Sat Jan 31 23:00:00 EST 1959 · J. Research Natl. Bur. Standards

DOI:https://doi.org/10.6028/jres.062.010· OSTI ID:4288989

Hague, J L; Machlan, L A

A procedure for the determination of niobium and tantalum in titanium- base alloys is described. The sample is dissolved in a mixture of hydrochloric and hydrofluoric acid, and oxidized wilh a minimum of nitric acid. The resulting solution is transferred to a column containing a strong quaternary amine anion- exchange resin (Dowex-1). Titanium and other alloying elements, except niobium and tantalum, are removed by elution with an ammonium chloride-hydrochloric- hydrofluoric acid soluiion. Niobium is removed by elution with an ammonium chloride-hydrofluoric acid solution. Tantalum is collected in a separate eluate of slightly acid ammonium chloride-ammonium fluoride solution. Boric acid is added to complex the fluoride, the earths acids precipitated with cupferron, ignited to the pentoxides, and weighed. (auth)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-13-009766
• OSTI ID: 4288989
• 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

Related Subjects

ACIDS
AMINES
AMMONIUM COMPOUNDS
ANIONS
BORON COMPOUNDS
CHEMICAL REACTIONS
CHEMISTRY
CHLORIDES
COMBUSTION
CUPFERRON
FLUORIDES
HYDROCHLORIC ACID
ION EXCHANGE
ION EXCHANGE MATERIALS
NIOBIUM
NITRIC ACID
OXIDATION
OXIDES
PRECIPITATION
QUANTITATIVE ANALYSIS
RESINS
SOLUTIONS
TANTALUM
TITANIUM ALLOYS
WEIGHT