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Determination of Thorium and Uranyl in Nitrophosphate Solution by On-Line Matrix-Elimination Reversed-Phase Chromatography


Hao, F and Paull, B and Haddad, PR, Determination of Thorium and Uranyl in Nitrophosphate Solution by On-Line Matrix-Elimination Reversed-Phase Chromatography, Chromatographia, 42, (11) pp. 690-696. ISSN 0009-5893 (1996) [Refereed Article]

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DOI: doi:10.1007/BF02267703


A reversed-phase chromatographic method combined with an on-line matrix-elimination procedure is described for the determination of thorium and uranium in the nitric acid digest of phosphate rocks. Phoslphate and other anions were fiirst removed from the sample solution using a cation-exchange pre-column to bind cations in the sample and a dilute nitric acid eluent to elute the anions. In the second stage of the procedure, a short C18 column was employed with a phenylhydroxyacetic acid solution used as the washing eluent. Thorium(IV) and uranyl were trapped on the C18 column whilst the transition and lanthanide metals present were flushed to waste due to their weaker retention. In the final step thorium(IV) and uranyl were transferred onto a reversed-phase C18 column, where they were sepoarated and quantified using -hydroxyisobutyric acid eluent with visible detection at 658 nm asfter post-column reaction with Arsenazo III. The entire procedure was performed automatically using a programmable HPLC pump.

Item Details

Item Type:Refereed Article
Keywords:Column liquiid chromatography - Thorium and uranyl in nitrophosphate solution - On-line preconcentration and clean-up - Matrix-elimination
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Instrumental methods (excl. immunological and bioassay methods)
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Paull, B (Professor Brett Paull)
UTAS Author:Haddad, PR (Professor Paul Haddad)
ID Code:8705
Year Published:1996
Web of Science® Times Cited:18
Deposited By:Chemistry
Deposited On:1996-08-01
Last Modified:2010-03-11

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