title: Determination of210Po and uranium in high salinity water samples.
abstract: A method for the determination of uranium and210Po in high salinity water samples has been elaborated. Both radionuclides are preconcentrated from 0.5 dm3saline media by co-precipitation with hydrated manganese dioxide, followed by dissolution of the precipitate in 200 mL of 1 M HCl. Uranium isotopes235U and238U can be directly determined by ICP MS method with a detection limit of 0.01 ppb for238U. Prior to a selective determination of210Po, the majority of other naturally occurring α-emitting radionuclides (uranium, thorium and protactinium) can be stripped from this solution by their extraction with a 50% solution of HDEHP in toluene. Finally,210Po is simply separated by direct transfer to an extractive scintillator containing 5% of trioctylphosphine oxide in Ultima Gold F cocktail and determined by an α/β separation liquid scintillation technique with detection limit below 0.1 mBq/dm3.
authors.affiliation: Department of Chemistry, Technical University of Lodz, Żeromskiego Street 116, 90924 Lodz, Poland.
authors.forename: Paweł
authors.initials: P
authors.lastname: Grabowski
authors.affiliation: Department of Chemistry, Technical University of Lodz, Żeromskiego Street 116, 90924 Lodz, Poland.
authors.forename: Henryk
authors.initials: H
authors.lastname: Bem
keywords: 210Po; Liquid scintillation counting with α/β separation; Uranium radionuclide