Packed-column supercritical fluid chromatography: Quantitative determination of uranium without liquid waste generation

Journal Article · Sat Feb 01 04:00:00 EST 1997 · Analytical Chemistry (Washington)

DOI:https://doi.org/10.1021/ac960163z· OSTI ID:501931

Martin-Daguet, V ^[1]; Gasnier, P ^[2]; Caude, M ^[3]

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1. Commissariat a l`Energie Atomique, Gif sur Yvette (France)
2. Cogema, Bagnols sur Ceze (France)
3. Ecole Superieure de physique et de Chimie Industrielles de la ville de Paris, Paris (France)

A new procedure for the determination of uranium by packed-column supercritical fluid chromatography is proposed. A nonfluorinated chelating agent selective for copper and uranium, the 2,6-diacetylpyridine bis(benzoylhydrazone), has been chosen. We have studied its chromatographic properties on different stationary phases and the influence of the methanol content in the carbon dioxide mobile phase. The separation of the metal compounds was conducted with and without solvent injection. A calibration curve was obtained for uranium in the range of 52-323 ng injected. The accuracy of the method is 0.5%, the repeatability 4%. The same studies were performed with a new compound, diacetyl-2,6 pyridine bis(4-tert-butyl benzoylhydrazone). An increase in retention and efficiency was then observed. 30 refs., 5 figs., 3 tabs.

• OSTI ID: 501931
• Journal Information: Analytical Chemistry (Washington), Journal Name: Analytical Chemistry (Washington) Journal Issue: 3 Vol. 69; ISSN ANCHAM; ISSN 0003-2700
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
CALIBRATION
CARBON DIOXIDE
CHELATING AGENTS
COPPER
METHANOL
NUMERICAL DATA
SEPARATION PROCESSES
SUPERCRITICAL FLUID CHROMATOGRAPHY
URANIUM