SUBSTOICHIOMETRIC DETERMINATION OF TRACES OF METALS VIA ACTIVATION ANALYSIS AND ISOTOPIC DILUTION METHODS

Journal Article · Tue Oct 01 04:00:00 EDT 1963 · Chemicke Listy (Czechoslovakia)

OSTI ID:4089431

Ruzicka, J; Stary, J

>On activating a trace metal by neutron irradiation, extraction and ion- exchange processes can be used to advantage in separating interfering activities. The efficiency of separation was evaluated for a 99.9% recovery of the product with <0.1% cross-contamination by an interfering impurity. The logarithms of the extraction constant K were tabulated for various cations such as Ag/sup +/, Al/ sup 3+/, Am/sup 3+/, Ba/sup Bk/sup 3+/, Cd/sup 2+/, C/sup 3+/, Co/sup 2+/, Cu/sup 2+/, Dy/sup 3+/, Es/sup 3+ /, Fe/sup 3+/, Fm/sup 3+/, Gd/sup 3+/, Hg/sup 2+/, In/ sup 3+/, Ni/sup 2+/, Pb/sup 2+/, Pu/sup 3+/, Pu/sup 4+/, PuO/sup 2+/, and others with the organic complexing agents such as acetylacetone (AA) benzoylacetone (BA), dibenzoylmethane (DBM), 8-hydroxyquinolin (Ox), cupferron (Cup), and dithizone (Dz). Use of the equations is illustrated by the separation of Hg from Cu as the acetylacetonates. Trace amounts of Cu, Zn, and Mo in GeO/sub 2/ can be determined by extracting the Cu as the dithizonate at pH = 1, Zn as the dithizonate at pH = 7, and Mo as the 8-hydroxyquinolate nt a pH = 1.3. This separation by extraction is simpler than the classical method, which involves the distillntion of GeO/sub 2/, the electrolysis of Cu, and many other steps. The same type of separation may be carried out on an ion exchanger by proper selection of the complexing agent. The stability constants of a number of metals are tabulated for the oxalate complexes, the tartrate complexes, the cyanide complexes, and complexes with NTA (nitriloacetic acid), EDTA (ethylenediamine tetraacetic acid), and HEDTA (1,2-diaminocyclohexane tetraacetic acid). The selective separation of two metals by ion exchange is discussed. (TTT)

• Research Organization: Charles Univ., Prague
• NSA Number: NSA-18-013652
• OSTI ID: 4089431
• Journal Information: Chemicke Listy (Czechoslovakia), Journal Name: Chemicke Listy (Czechoslovakia) Vol. Vol: 57; ISSN CHLSA
• Country of Publication: Country unknown/Code not available
• Language: Czech

Related Subjects

ACETIC ACID
ACETONE
ACETYL RADICALS
ACTIVATION ANALYSIS
ALUMINUM
AMERICIUM
BARIUM
BENZOYL RADICALS
BERKELIUM
CADMIUM
CALIFORNIUM
CHELATES
CHEMISTRY
COBALT
COMPLEXES
COPPER
COPPER COMPLEXES
CUPFERRON
CYANIDES
DITHIZONE
DYSPROSIUM
EDTA
EINSTEINIUM
EQUATIONS
FERMIUM
GADOLINIUM
GERMANIUM OXIDES
HEDTA
IMPURITIES
INDIUM
ION EXCHANGE
IRON
ISOTOPE DILUTION
ISOTOPES
LEAD
MERCURY
MERCURY COMPLEXES
METALS
METHANE
MOLYBDENUM
MOLYBDENUM COMPLEXES
NICKEL
NTA
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXALATES
PLUTONIUM
QUANTITATIVE ANALYSIS
QUINOLINE
SEPARATION PROCESSES
SILVER
SOLUTIONS
SOLVENT EXTRACTION