EDTA titrations of zirconium and hafnium and their practical applications

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Bunseki Kagaku (Japan Analyst)

DOI:https://doi.org/10.2116/bunsekikagaku.11.1176· OSTI ID:4160800

TSUCHIYA, Yohe

EDTA titrations of zirconium and hafnium can be performed in boiling solutions containing 0.9 plus or minus 0.3N free hydrochloric acid using xylenol orange as an indicator. The color change is from red to yellow which should persist on boiling for one minute. Interferences are not caused by 1 g of uranium(VI), iron(II), aluminum, zinc, tin, or magnesium, 0.1 g of titanium or sulfate, and 1 mg of phosphate ions. Iron(III) must be reduced with tin(II) chloride. Interference from 0.1 g of thorium can be overcome by addition of about 5 mg of sulfate ion. When hafnium is present with zirconium, the former can be calculated by combining the gravimetric method with mandelic acid. The method was successfully applied for the rapid determination of zirconium and hafnium in zircon sands, special porcelains, and a magnesium alloy.

• Research Organization: Nagoya Municipal Industrial Research Inst., Japan
• Sponsoring Organization: USDOE
• NSA Number: NSA-18-001556
• OSTI ID: 4160800
• Journal Information: Bunseki Kagaku (Japan Analyst), Journal Name: Bunseki Kagaku (Japan Analyst) Journal Issue: 11 Vol. 11; ISSN 0525-1931
• Country of Publication: Country unknown/Code not available
• Language: Japanese

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ACIDITY
ALLOYS
BOILING
CERAMICS
CORROSION
CORROSION PROTECTION
DIAGRAMS
DIFFRACTION
DYES
EDTA
FILMS
HAFNIUM
HYDROCHLORIC ACID
INTERFERING ELEMENTS
IRON COMPOUNDS
MAGNESIUM ALLOYS
METALS
MINERALS
PLANNING
QUALITATIVE ANALYSIS
REDUCTION
SOLUTIONS
TABLES
TIN CHLORIDES
TITRATION
XYLENOL ORANGE
ZIRCON
ZIRCONIUM
ZIRCONIUM SILICATES