SPECTROPHOTOMETRIC METHODS FOR THE DETERMINATION OF OSMIUM. III. REACTION OF OSMIUM TETROXIDE WITH 1:5-DIPHENYLCARBOHYDRAZIDE IN AQUEOUS SOLUTIONS FOLLOWED BY EXTRACTION OF THE COMPLEX

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

DOI:https://doi.org/10.1016/0039-9140(61)80025-8· OSTI ID:4035439

Goldstein, G; Manning, D L; Menis, O; Dean, J A

A spectrophotometric method has been developed which is applicable to the determination of extremely small quantities of osmium. Osmium is oxidized to the octovalent state, then added to an acidic aqueous solution contalning 1:5- diphenylcarbohydrazide (DPC). After heating the aqueous solution to 65 deg , the osmium-DPC complex is extracted with chloroform. A molar absorbancy index of about 150,000 is obtained. From 7 to 25 mu g of osmium can be determined with a coefficient of variation of 6%. It was established that Fe/sup III/, Cu/sup II/, Ru/sup III/, and Au/sup I/ /sup II/ seriously interfere in the determination of osmium by this method, while Cr/sup VI/, Ni/sup II/, Mo/sup VI/, Ir /sup III/ and chloride interfere only when present in relatively high concentrations. (auth)

• Research Organization: Oak Ridge National Lab., Tenn.
• NSA Number: NSA-15-023477
• OSTI ID: 4035439
• 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

ACIDS
CARBAZIDES
CHEMISTRY
CHLORIDES
CHLOROFORM
CHROMIUM
COLOR
COMPLEXES
COPPER
DPCA
ERRORS
GOLD
HEATING
IMPURITIES
INTERFERING ELEMENTS
IRIDIUM
IRON
MOLYBDENUM
NICKEL
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OSMIUM
OXIDATION
PHENYL RADICALS
PHOTOMETRY
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
RUTHENIUM
SOLUTIONS
SOLVENT EXTRACTION
SPECTRA
WATER