Determination of uranium by reversed-phase high-performance liquid chromatography

Journal Article · Fri Feb 01 04:00:00 EST 1985 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac50001a053· OSTI ID:5677789

Casoli, A; Mangia, A; Predieri, G

In spite of the large number of methods already reported, the determination of the uranyl ion is still a relevant analytical problem because the usual techniques of atomic absorption and emission spectroscopy are not suitable for the trace analysis of UO/sub 2//sup 2 +/, owing to their high detection limits. In this paper a new chromatographic procedure is proposed; this procedure is based on the separation and determination of UO/sub 2//sup 2 +/ as a neutral complex, using reversed-phase chromatography and spectrophotometric detection. In this work the ligand 2,6-diacetylpyridine bis(benzoyl-hydrazone) was used for the solvent extraction and chromatographic determination of uranium. The compounds of this class of bis(aroylhydrazone) derivatives are potential pentadentate chelating agents which can behave as neutral or bisdeprotonated ligands. Because of its steric and electronic features, H/sub 2/DIB is particularly suitable for complexing the uranyl ion. High extraction yields of UO/sub 2//sup 2 +/ from aqueous to dichloromethane solutions have been obtained, copper being the only metal with comparable extraction yield. The behavior of this ligand in the extraction of the uranyl ion, in addition to the high molar absorption of the complex in the UV region, suggested its use for the chromatographic determination of uranium, using a commercial apparatus with spectrophotometric detection.

• Research Organization: Universita di Parma, Italy
• OSTI ID: 5677789
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 57:2; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

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ACTINIDE COMPLEXES
ACTINIDES
CHELATES
CHELATING AGENTS
CHEMICAL ANALYSIS
CHROMATOGRAPHY
COMPLEXES
DATA
ELEMENTS
EXPERIMENTAL DATA
EXTRACTION
INFORMATION
LIGANDS
LIQUID COLUMN CHROMATOGRAPHY
METALS
NUMERICAL DATA
QUANTITATIVE CHEMICAL ANALYSIS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTROPHOTOMETRY
TRACE AMOUNTS
URANIUM
URANIUM COMPLEXES
URANYL COMPLEXES