RADIOMETRIC TRACE ANALYSIS OF COBALT WITH DIETHYLDITHIOCARBAMATE-$sup 35$S, OR $sup 203$Hg

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Analytica Chimica Acta (Netherlands)

DOI:https://doi.org/10.1016/S0003-2670(00)88346-4· OSTI ID:4817245

van Erkelens, P C

Two radiometric methods for the determination of submicrogram amounts of cobalt are described. Cobalt ls extracted from an ammoniacal solution with a zincdiethyldithlocarbamate- S/sup 35/ solution ln chloroform. Excess reagent and lnterferlng metals are removed with mercury(II) and cyanide. The S/sup 35/ in the final organic layer is a measure of the cobalt ln thls layer. In the secon method cobalt is extracted from an ammoniacal solution with a fixed amount of zinc-DDC ln chloroform. Excess reagent and compIexes of forelgn metals are removed by exchange wlth Hg//sup 203 2+/ and the Hg/sup 203/ ln the chloroform (compared wlth a blank) acts as a measure of the cobalt. The flrst method ls applicable to 0.1 mu g of cobalt and the second to 0.8 mu g. As the efficiency of both processes is varlable, lsotope dlIutlon with Co/sup 60/ is carried out. A 10-fold and 4-fold excess of forelgn rnetals ls permitted in the flrst and second method, respectively; larger amounts are previously removed by extraction with inactive zinc-DDC from sodium hydroxide media. (auth)

• Research Organization: Inst. of Animal Husbandry "Schoonoord," Utrecht
• NSA Number: NSA-16-008690
• OSTI ID: 4817245
• Journal Information: Analytica Chimica Acta (Netherlands), Journal Name: Analytica Chimica Acta (Netherlands) Vol. Vol: 26; ISSN ACACA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CARBAMATES
CHEMISTRY
CHLORINATED HYDROCARBONS
CHLOROFORM
COBALT
COBALT 60
COBALT COMPLEXES
CYANIDES
ERRORS
ETHYL RADICALS
IMPURITIES
INTERFERING ELEMENTS
ISOTOPE DILUTION
ISOTOPES
ISOTOPIC EXCHANGE
MERCURY 203
MERCURY COMPOUNDS
ORGANIC CHLORINE COMPOUNDS
ORGANIC SULFUR COMPOUNDS
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
SODIUM HYDROXIDES
SOLUTIONS
SOLVENT EXTRACTION
SULFUR 35
TRACE AMOUNTS