SPECTROPHOTOMETRIC DETERMINATION OF RHENIUM WITH 4-METHYLNIOXIME

Journal Article · Wed Feb 01 04:00:00 EST 1961 · Talanta (England)

DOI:https://doi.org/10.1016/0039-9140(61)80018-0· OSTI ID:4034264

Kassner, J L; Ting, S; Grove, E L

A simple method applicable to the spectrophotometric determination of less than 0.001% to more than 1.0% of rhenium in molybdenite concentration and ln "molybdenite roaster flue dust" has been developed. Interfering elements commonly found in these materials are removed in three operations: evaporation with hydrochloric acid, precipitation of hydrous oxides with ammonia, and formation of organometallic compounds with ethyl xanthate and chloroform extraction. The method is based on the formation of a soluble, stable, yellow- green rhenium-4-methylnioxime chelate where rhenium/sup VII/ is reduced by tin/ sup II/ chloride in a dilute hydrochloric acid solution in the presence of 4methylnioxime (4-methyl-1: 2-cyclohexanedionedioxime). The color develops in less than 5 min and the chloroform extract shows a maximum absorption at 436 m mu . The calibration curve corforms to Beer's law. The molar extinction coefficient for rhenium-4-methylnioxime is abcut 6.89 x 104 as compared to less than 4.5 x l0/sup 4/ reported for other methods for rhenium. (auth)

• Research Organization: Univ. of Alabama, University
• NSA Number: NSA-15-023473
• OSTI ID: 4034264
• Journal Information: Talanta (England), Journal Name: Talanta (England) Vol. Vol: 7; ISSN TLNTA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
AMMONIA
CHELATES
CHEMISTRY
CHLORINATED HYDROCARBONS
CHLOROFORM
COLOR
CYCLOALKANES
DUSTS
ETHYL RADICALS
EVAPORATION
HEXANE
HYDROCHLORIC ACID
IMPURITIES
KETONES
METHYL RADICALS
MOLYBDENITE
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
ORE PROCESSING
ORGANIC COMPOUNDS
PHOTOMETRY
PRECIPITATION
QUANTITATIVE ANALYSIS
REDUCTION
RHENIUM
SOLVENT EXTRACTION
SPECTRA
TIN CHLORIDES
XANTHATES