Comparison of 238U mass fraction measured by ICP–MS and Instrumental Neutron Activation Analysis techniques

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dc.contributor.authorTAPPIZ, BRUNOpt_BR
dc.contributor.authorSILVA, PAULO S.C. dapt_BR
dc.contributor.authorOSTERMANN, CAROLINEpt_BR
dc.contributor.authorLIMA, NICOLE P. dept_BR
dc.contributor.authorANDRADE, MARIANA N. dept_BR
dc.contributor.authorBUSTILLOS, OSCAR V.pt_BR
dc.contributor.coordenadorSIMIONATO, ANA V.C.pt_BR
dc.coverageInternacionalpt_BR
dc.creator.eventoIBEROAMERICAN CONFERENCE ON MASS SPECTROMETRY, 3rdpt_BR
dc.date.accessioned2023-03-23T18:18:07Z
dc.date.available2023-03-23T18:18:07Z
dc.date.eventoDecember 10-15, 2022pt_BR
dc.description.abstractIntroduction: Uranium is an element present in ambient air, water, soil and rocks [1]. The most abundant natural radioisotope of this actinide (238U) produces in its chain decay the radionuclide 222Rn [2], which is a tracer for atmospheric mixing and transport model validations [3]. The 238U activity concentration in superficial soil samples is a crucial parameter for some 222Rn flux map modeling methodologies [4]. Methods: In this study, 18 superficial soil samples were analyzed. The content of 238U was assessed using two techniques: (i) by the comparative method of the Instrumental Neutron Activation Analysis (INAA) [5] and by ICP–MS (ELAN 6000, PerkinElmer) [6]. Certified Reference Materials (CRM) SRM 1646a Estuarine Sediment and USG STM–2 were used both as comparators in the INAA technique and to ensure quality control. The normality and homoscedasticity of the data were evaluated. Finally, the Mann- Whitney U test [7] was used to assess whether or not there is a significant difference (α = 0.05) between the two techniques. Results: The z-score was calculated to ensure quality control. Z-scores values was obtained by the Modified Horwitz Equation [8], which takes into account the order of magnitude of the content of the analyte and is independent of the CRM uncertainties, unavailable for the CRM used. The z-score values obtained (n = 3) for the radionuclide 238U were 0.5 for the CRM USG STM–2 and -0.4 for SRM 1646a. The z-scores obtained are smaller than 2 therefore they are considered satisfactory [9]. Regarding the statistical parameters of the comparison between the techniques, the normality (Shapiro Wilk) was not verified (p = 0.02 for ICP-MS and p = 0.03 for INAA). The p-value for the test for equal variances (F test) was 0.71 Mann-Whitney U test was used instead of Student’s test due to the non-verification of the normality parameter in the data. The p-value from the Mann-Whitney test (0.51) indicates that there is no significant difference between the 238U content measured by the two techniques. Conclusions: Statistical analysis showed that there is no significant difference between the 238U mass fraction measured by the ICP–MS and the INAA – comparative method. In the future, certified reference materials will also be assessed by ICP–MS in order to corroborate this statistical comparison from a metrological point of view.pt_BR
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)pt_BR
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorshipIDCAPES: 88887.577746/2020-00pt_BR
dc.description.sponsorshipIDCNPq: 161797/2021-0pt_BR
dc.event.siglaIBEROpt_BR
dc.format.extent237-238pt_BR
dc.identifier.citationTAPPIZ, BRUNO; SILVA, PAULO S.C. da; OSTERMANN, CAROLINE; LIMA, NICOLE P. de; ANDRADE, MARIANA N. de; BUSTILLOS, OSCAR V. Comparison of 238U mass fraction measured by ICP–MS and Instrumental Neutron Activation Analysis techniques. In: SIMIONATO, ANA V.C. (coord.). In: IBEROAMERICAN CONFERENCE ON MASS SPECTROMETRY, 3rd, December 10-15, 2022, Rio de Janeiro, RJ. <b>Abstract...</b> Campinas, SP: Sociedade Brasileira de Espectrometria de Massas - BrMASS, 2022. p. 237-238. Disponível em: http://repositorio.ipen.br/handle/123456789/33929.
dc.identifier.orcidhttps://orcid.org/0000-0002-4712-4057
dc.identifier.orcidhttps://orcid.org/0000-0002-9351-9201
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/33929
dc.localCampinas, SPpt_BR
dc.local.eventoRio de Janeiro, RJpt_BR
dc.publisherSociedade Brasileira de Espectrometria de Massas - BrMASSpt_BR
dc.rightsopenAccesspt_BR
dc.titleComparison of 238U mass fraction measured by ICP–MS and Instrumental Neutron Activation Analysis techniquespt_BR
dc.typeResumo de eventos científicospt_BR
dspace.entity.typePublication
ipen.autorBRUNO TAPPIZ
ipen.autorCAROLINE KAKO OSTERMANN
ipen.autorMARIANA NOVAIS DE ANDRADE
ipen.autorJOSE OSCAR WILLIAM VEGA BUSTILLOS
ipen.autorNICOLE PEREIRA DE LIMA
ipen.autorPAULO SERGIO CARDOSO DA SILVA
ipen.codigoautor11684
ipen.codigoautor15008
ipen.codigoautor14829
ipen.codigoautor82
ipen.codigoautor14277
ipen.codigoautor2777
ipen.contributor.ipenauthorBRUNO TAPPIZ
ipen.contributor.ipenauthorCAROLINE KAKO OSTERMANN
ipen.contributor.ipenauthorMARIANA NOVAIS DE ANDRADE
ipen.contributor.ipenauthorJOSE OSCAR WILLIAM VEGA BUSTILLOS
ipen.contributor.ipenauthorNICOLE PEREIRA DE LIMA
ipen.contributor.ipenauthorPAULO SERGIO CARDOSO DA SILVA
ipen.date.recebimento23-03
ipen.event.datapadronizada2022pt_BR
ipen.identifier.ipendoc29563pt_BR
ipen.notas.internasAbstractpt_BR
ipen.type.genreResumo
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sigepi.autor.atividadeBUSTILLOS, OSCAR V.:82:520:Npt_BR
sigepi.autor.atividadeANDRADE, MARIANA N. de:14829:520:Npt_BR
sigepi.autor.atividadeLIMA, NICOLE P. de:14277:310:Npt_BR
sigepi.autor.atividadeOSTERMANN, CAROLINE:15008:520:Npt_BR
sigepi.autor.atividadeSILVA, PAULO S.C. da:2777:310:Npt_BR
sigepi.autor.atividadeTAPPIZ, BRUNO:11684:520:Spt_BR
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