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Artículo
Determination of U isotopic ratios in environmental samples by ICP-MS
dc.creator | Uchida, Shigeo | |
dc.creator | García-Tenorio García-Balmaseda, Rafael | |
dc.creator | Tagami, Keiko | |
dc.creator | García León, Manuel | |
dc.date.accessioned | 2015-02-26T16:54:33Z | |
dc.date.available | 2015-02-26T16:54:33Z | |
dc.date.issued | 2000 | |
dc.identifier.issn | 0267-9477 | es |
dc.identifier.issn | 1364-5544 | es |
dc.identifier.uri | http://hdl.handle.net/11441/22784 | |
dc.description.abstract | Inductively coupled plasma mass spectrometry (ICP-MS) has been used for the determination of trace elements in a variety of materials. For uranium, the concentration of 238U can be measured with a detection limit of less than 0.1 ppt in a few minutes. However, because of the extremely low 234U concentrations in environmental materials, it is necessary to separate U from the matrices and to remove interfering elements from the sample solution for measurement of the 238U/234U ratio by ICP-MS. In this study, a simple and rapid separation method for U with an extraction chromatographic resin (TEVA resin) was developed for ICP-MS and the U isotopic ratios in phosphogypsum samples, collected in Spain, were measured. The resin efficiently retained U in 6 M HCl medium and more than 98% of the U was easily eluted with the first 30 mL of 0.1 M HNO3. The separated solutions were free from most of the matrix elements and the concentrations of U in the solutions ranged from 35 to 70 ppb. The 238U/234U isotopic ratios in the solutions were measured by ICP-MS. Moreover, due to the presence of a higher number of 235U atoms in comparison with 234U, the 238U/235U isotopic ratios were also determined with high precision by ICP-MS. The results obtained agreed well with the ratios measured by alpha-spectrometry. The method for this determination is more rapid than alpha-spectrometry, and is considered to be more suitable for environmental monitoring. | es |
dc.format | application/pdf | es |
dc.language.iso | eng | es |
dc.relation.ispartof | Journal of analytical atomic spectrometry, 15, 889-892 | es |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.title | Determination of U isotopic ratios in environmental samples by ICP-MS | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Física Aplicada II | es |
dc.relation.publisherversion | 10.1039/b001332n | es |
dc.relation.publisherversion | 10.1039/b001332n | |
dc.identifier.idus | https://idus.us.es/xmlui/handle/11441/22784 |
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