title: An improved radiochemical separation of uranium and thorium in environmental samples involving peroxide fusion.
abstract: A radiochemical procedure for the accurate determination of uranium and thorium using peroxide fusion followed by ion exchange and extraction chromatography is described. The method of extraction of the element from solid samples is the most important factor in the investigation. It is demonstrated, by measuring a number of reference materials, that fusion with Na(2)O(2) ensures a complete destruction of the mineral lattice and greatly improves the determination of the true activity of actinides.
authors.affiliation: Institut Pluridisciplinaire Hubert-Curien UMR 7178 CNRS and Université Louis Pasteur 23, rue du Loess, BP28, 67037 Strasbourg Cedex 2, France. catherine.galindo@ires.in2p3.fr
authors.forename: C
authors.initials: C
authors.lastname: Galindo
authors.forename: L
authors.initials: L
authors.lastname: Mougin
authors.forename: A
authors.initials: A
authors.lastname: Nourreddine
mesh_terms: D002852:Chromatography, Ion Exchange / Q000379:methods*; D010545:Peroxides / Q000737:chemistry; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods; D012972:Sodium Hydroxide / Q000737:chemistry; D012990:Soil Pollutants, Radioactive / Q000737:chemistry* / Q000302:isolation & purification*; D013910:Thorium / Q000737:chemistry* / Q000302:isolation & purification*; D014501:Uranium / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D010545:Peroxides; D012990:Soil Pollutants, Radioactive; D014501:Uranium; D012972:Sodium Hydroxide; D013910:Thorium