DETERMINATION OF SCANDIUM IN MINERALS AND SEA-WATER

Journal Article · Mon Apr 01 04:00:00 EST 1963 · Nippon Kagaku Zasshi (Japan) Formerly Nippon Kagaku Kaishi (1921- 47) Merged with Kogyo Kagaku Zasshi to form Nippon Kagaku Kaishi

DOI:https://doi.org/10.1246/nikkashi1948.84.4_336· OSTI ID:4682962

Shigematsu, T; Tabushi, M; Nishikawa, Y; Hiraki, K; Goda, S; Inoue, R

Scandium was determined in mineral and sea-water samples by a spectrophotometric method with 5,7-dichloroxine. The procedure is as follows: 0.5 to 1 g of mineral sample is treated wtth HF and dissolved in HCl. 100 to 200 mg of Ca/sup 2+/ as a carrier and oxalic acid solution are added and pH of the solution is adjusted to 1.8. After standing overnight, the precipitate is ignited and the residue is dissolved in HCl. Sc is separated by extracting at pH 1.5 with 10 ml of 0.2 M TTA--benzene followed by back extracting with 20 ml of 1 N HCl. After Fe and other interfering elements are pre-extracted at pH 3 as 5,7- dichloroxinate, the Sc chelate is successively extracted at pH 9.5 with 10 ml of chloroform. Absorbances are measured at 397 m mu against the reagent blank. Sc in sea water is concentrated also by coprecipitating with Ca oxalate, using each 200 ml of 2 N oxalic acid for 20 l of sample. Several mineral samples such as bauxite, garnet, lepidolite, and fluorspar were analyzed, and a Sc content of 10/ sup -3/ to 10/sup -4/ was obtained. Sc in sea water collected at offshore Misaki- cho gave the order of 10/sup -3/ mu g/l. (auth)

• Research Organization: Kyoto Univ.
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-033829
• OSTI ID: 4682962
• Journal Information: Nippon Kagaku Zasshi (Japan) Formerly Nippon Kagaku Kaishi (1921- 47) Merged with Kogyo Kagaku Zasshi to form Nippon Kagaku Kaishi, Journal Name: Nippon Kagaku Zasshi (Japan) Formerly Nippon Kagaku Kaishi (1921- 47) Merged with Kogyo Kagaku Zasshi to form Nippon Kagaku Kaishi Vol. Vol: 84; ISSN NPKZA
• Country of Publication: Country unknown/Code not available
• Language: Japanese

Related Subjects

ABSORPTION
ACIDITY
ALUMINUM OXIDES
ALUMINUM SILICATES
BAUXITES
BENZENE
CALCIUM FLUORIDES
CHELATES
CHEMISTRY
CHLOROFORM
COMBUSTION
FLUORSPAR
GARNETS
HYDROCHLORIC ACID
HYDROFLUORIC ACID
IMPURITIES
LEPIDOLITE
LITHIUM COMPOUNDS
MICA
MINERALS
ORGANIC CHLORINE COMPOUNDS
OXALATES
OXALIC ACID
PHOTOMETRY
PRECIPITATION
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
RESIDUES
SCANDIUM
SCANDIUM COMPLEXES
SEA
SOLUTIONS
SOLVENT EXTRACTION
SPECTROSCOPY
WATER