Determination of Aluminum in Thorium Compounds by Linear-Sweep Oscillographic Polarography

Journal Article · Sun Apr 01 04:00:00 EST 1962 · Analytical Chemistry

DOI:https://doi.org/10.1021/ac60184a015· OSTI ID:4797142

Florence, T. M.

A method is presented for the determination of traces of aluminum in thorium compounds by oscillographic polarography using the dye Superchrome Garnet Y (5-sulfo-2',4',2trihydroxyazobenzene). A separatiun of aluminum is avoided by masking thorium with acetate, and of 35 ions investigated, only Fe²⁺,/ Fe ³⁺, Ni²⁺, Pb²⁺, and V⁵⁺ caused signifi cant interference. After a rapid mercury-cathode electrolysis to remove many heavy metals, the method is highly selective for aluminum. The limit of detection is 1 mu g of aluminum per gram uf thorium with a relative standard deviation of plus or minus 3% at an aluminum concentration of 400 ppm, and plus or minus 7% at 10 ppm. Results obtained on various thorium compounds showed good agreement between the polarographic method and a spectrophotometric method using 8-quinolinol.

• Research Organization: Australian Atomic Energy Commission Research Establishment, Lucas Heights, New South Wales
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-012963
• OSTI ID: 4797142
• Report Number(s): AAEC/TM-122; 0003-2700
• Journal Information: Analytical Chemistry, Journal Name: Analytical Chemistry Journal Issue: 4 Vol. 34; ISSN 0003-2700
• Publisher: American Chemical Society (ACS)
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ACETATES
ALUMINUM
DYES
EFFICIENCY
ERRORS
INTERFERING ELEMENTS
MASKING AGENTS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OSCILLATIONS
POLAROGRAPHY
QUANTITATIVE ANALYSIS
THORIUM COMPOUNDS