THE DETERMINATION OF CHROMIUM IN CALCIUM FLUORIDE MOULD LINING

Technical Report · Tue Mar 13 04:00:00 EST 1951

OSTI ID:4163655

A method for the determination of chromium in calcium fluoride mold lininge is presented. The calcium fluoride material is fused with fusion mixtture in a platinum dish, leached with water, the solution filtered and neutralized with nitric acid. Boric acid is added to complex the fluoride and the chromium is oxidized by boiling with potassium bromate solution, the excess bromate being decomposed by boiling with sodium chloride. The solution is cooled, diluted, and diphenal carbazide is added. The chromium is determined spectrophotometrically. (auth)

• Research Organization: Gt. Brit. Springfields Works, Springfields, Lancs, England
• NSA Number: NSA-14-009458
• OSTI ID: 4163655
• Report Number(s): SCS-M-57B
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BOILING
BROMATES
CALCIUM FLUORIDES
CARBAZIDES
CHEMISTRY
CHROMIUM
COLOR
COMPLEXES
DECOMPOSITION
DPCA
DYES
FILTERS
FLUORIDES
LEACHING
MEASURED VALUES
MELTING
MIXING
NITRIC ACID
ORGANIC NITROGEN COMPOUNDS
OXIDATION
PHENYL RADICALS
PHOTOMETRY
PLATINUM
POTASSIUM COMPOUNDS
QUANTITATIVE ANALYSIS
SODIUM CHLORIDES
SOLUTIONS
SPECTRA
WATER