title: Packed-Column Supercritical Fluid Chromatography:  Quantitative Determination of Uranium without Liquid Waste Generation.
abstract: 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.
authors.affiliation: Centre d'Etude de Saclay, Commissariat à l'Energie Atomique, DCC/DPE/SPEA/SAIS, Bat391, 91191 Gif sur Yvette, France, Service Laboratoire, Etablissement de Marcoule, Cogéma, BP 170, 30205 Bagnols sur Cèze Cedex, France, and Laboratoire de Chimie Analytique (associé au CNRS 437), Ecole Supérieure de Physique et de Chimie Industrielles de la Ville de Paris, 10 rue Vauquelin, 75231 Paris Cedex 05, France.
authors.forename: V
authors.initials: V
authors.lastname: Martin-Daguet
authors.forename: P
authors.initials: P
authors.lastname: Gasnier
authors.forename: M
authors.initials: M
authors.lastname: Caude