Dynamic chromatographic systems for the determination of rare earths and thorium in samples from uranium ore refining processes

Journal Article · Mon Sep 01 04:00:00 EDT 1986 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00124a023· OSTI ID:5345779

Barkley, D J; Blanchette, M; Cassidy, R M; Elchuk, S

Dynamic ion exchange has been used for the rapid separation (16 min) and determination of rare earths and Y in samples from hydrometallurgical processes used to recover, U, Th, Y, and the rare earths from uranium ore. Optimization of the effective capacity of the dynamic ion exchanger and the selectivity of postcolumn reaction detection permitted analysis down to 0.1 ..mu..g-mL/sup -1/ of the rare earths and yttrium in the presence of U, Th, and a number of other metal ions. A comparison with X-ray fluorescence results showed good agreement, and the chromatographic procedure offered considerable savings in analysis time. Studies with Th(IV) and U(VI) showed that both metal ions exhibited selective sorption of their ..cap alpha..-hydroxyisobutyric complexes, formed in situ in the eluent, onto reversed phases. The analytical results obtained showed that this dynamic separation process could be used for the determination of Th, and its potential for the determination of U was demonstrated.

• Research Organization: Canada Centre for Mineral and Energy Technology, Ottawa, Ontario
• OSTI ID: 5345779
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 58:11; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
400105 -- Separation Procedures
ACTINIDES
CHEMICAL ANALYSIS
CHROMATOGRAPHY
DATA
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
ION EXCHANGE CHROMATOGRAPHY
METALS
NUMERICAL DATA
ORES
QUANTITATIVE CHEMICAL ANALYSIS
RARE EARTHS
SEPARATION PROCESSES
THORIUM
TRACE AMOUNTS
TRANSITION ELEMENTS
URANIUM ORES
YTTRIUM