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dc.contributor.authorLópez-Lora, Mercedes-
dc.contributor.authorChamizo, Elena-
dc.contributor.authorVilla-Alfageme, María-
dc.contributor.authorHurtado-Bermúdez, Santiago-
dc.contributor.authorCasacuberta, Nuria-
dc.contributor.authorGarcía-León, Manuel-
dc.date.accessioned2017-12-28T07:46:56Z-
dc.date.available2017-12-28T07:46:56Z-
dc.date.issued2018-
dc.identifierdoi: 10.1016/j.talanta.2017.09.026-
dc.identifierissn: 0039-9140-
dc.identifiere-issn: 1873-3573-
dc.identifier.citationTalanta 178: 202-210 (2018)-
dc.identifier.urihttp://hdl.handle.net/10261/158608-
dc.description.abstractIn this work we present and evaluate a radiochemical procedure optimised for the analysis of U and Pu in seawater samples by Accelerator Mass Spectrometry (AMS). The method is based on Fe(OH) co-precipitation of actinides and uses TEVA® and UTEVA® extraction chromatography resins in a simplified way for the final U and Pu purification. In order to improve the performance of the method, the radiochemical yields are analysed in 1 to 10 L seawater volumes using alpha spectrometry (AS) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Robust 80% plutonium recoveries are obtained; however, it is found that Fe(III) concentration in the precipitation solution and sample volume are the two critical and correlated parameters influencing the initial uranium extraction through Fe(OH) co-precipitation. Therefore, we propose an expression that optimises the sample volume and Fe(III) amounts according to both the U and Pu concentrations in the samples and the performance parameters of the AMS facility. The method is validated for the current setup of the 1 MV AMS system (CNA, Sevilla, Spain), where He gas is used as a stripper, by analysing a set of intercomparison seawater samples, together with the Laboratory of Ion Beam Physics (ETH, Zürich, Switzerland).-
dc.description.sponsorshipThis work has been financed from the project FIS2015-69673-P, funded by the Spanish Ministry of Economy. This work was partially funded by Fundación Cámara Sevilla through a Grant for Graduate Studies (M.L.L).-
dc.publisherElsevier-
dc.relationMINECO/ICTI2013-2016/FIS2015-69673-P-
dc.rightsclosedAccess-
dc.subjectIon-exchange chromatography-
dc.subjectPreconcentration-
dc.subjectAccelerator Mass Spectrometry-
dc.subjectSeawater-
dc.subjectPlutonium-
dc.subject236U-
dc.titleIsolation of 236U and 239,240Pu from seawater samples and its determination by Accelerator Mass Spectrometry-
dc.typeArtículo-
dc.date.updated2017-12-28T07:46:58Z-
dc.description.versionPeer Reviewed-
dc.language.rfc3066eng-
dc.contributor.funderMinisterio de Economía y Competitividad (España)-
dc.contributor.funderFundación Cámara Sevilla-
dc.relation.csic-
dc.identifier.funderhttp://dx.doi.org/10.13039/501100003329es_ES
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