Separation and determination of trace metal ions using organic chelating reagents

Technical Report · Sun Nov 01 04:00:00 EST 1987

OSTI ID:5252337

Palmieri, M D

The four reagents tested were N,N-dihexylacetamide (DHA), 2,6-diacetylpyridine bis(furoylhydrazone) (H/sub 2/dapf), 1,3-dimethyl-4-acetyl-2-pyrazolin-5-one (DMAP) and N-methylfurohydroxamic acid (NMFHA). DHA and H/sub 2/dapf were investigated for their complex formation with uranium, and DMAP and NMFHA were used as chelating agents in high performance liquid chromatography (HPLC). Uranium(VI) is preferentially extracted from nitric acid solutions using DHA in toluene. The extraction characteristics of the U-DHA complex are studied. A 119,000 ..mu..gL/sup -1/ U solution is analyzed for twenty-six elements. The U is extracted with DHA, and the trace metal ions are then determined by inductively coupled plasma-mass spectrometry. Uranium must be removed from the sample before analysis to prevent ionization suppression. H/sub 2/dapf is synthesized and characterized. Studies of the complexation of metal ions with H/sub 2/dapf is described. U(VI) forms a stable complex with H/sub 2/dapf, and a procedure for selectively determining trace U by spectrophotometry is presented. DMAP complexes of Cu(II), Fe(III), Ga(III), Th(IV), U(VI), V(V), and Zr(IV) are separated using reversed phase HPLC. NMFHA complex of Al(III), Fe(III), Hf(IV), Nb(V), Sb(III), and Zr(IV) are separated using reversed phase HPLC. NMFHA is also used to separate uranium(VI) from trace lanthanide ions. 266 refs., 46 figs., 24 tabs

• Research Organization: Ames Lab., IA (USA)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5252337
• Report Number(s): IS-T-1319; ON: DE88007353
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
400105 -- Separation Procedures
ACTINIDES
CHELATES
CHELATING AGENTS
CHEMICAL ANALYSIS
CHROMATOGRAPHY
COMPLEXES
ELEMENTS
EXTRACTION
HAFNIUM
MASS SPECTROSCOPY
METALS
MULTI-ELEMENT ANALYSIS
QUANTITATIVE CHEMICAL ANALYSIS
RARE EARTHS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTROPHOTOMETRY
SPECTROSCOPY
THORIUM
TRACE AMOUNTS
TRANSITION ELEMENTS
URANIUM
ZIRCONIUM