Estimated expanded uncertainty of measurement for fish samples analyzed by instrumental neutron activation analysis
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2017
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60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS
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Resumo
Expanded measurement uncertainty is an estimate characterizing the range of
values at which the true value of a measurand is at a defined confidence level. Expanded
uncertainty is one of the three pillars of metrology, along with metrological
traceability and methodological validation. Due to the importance of this parameter,
it was estimated following the Guide to the Expression of Uncertainty in Measurement
(GUM) for element measurement results obtained by Instrumental Neutron Activation
Analysis (INAA) performed with short irradiations at the Pneumatic System
of the IEA-R1 research reactor at IPEN – CNEN/SP. Samples of Brazilian sardine
(Sardinella brasiliensis), one of the most consumed species in the city of São Paulo
were analyzed and Br, Cl, Mg, Mn, Na and K were determined. For the analyzed
elements, the values of expanded uncertainty with coverage factor k = 2 are lower
than natural variation (standard deviation) of the elements mass fractions observed
in a collected batch of 10 individual specimens.
Como referenciar
TAPPIZ, B.; MOREIRA, E.G. Estimated expanded uncertainty of measurement for fish samples analyzed by instrumental neutron activation analysis. In: 60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS, November 28 - December 01, 2017, São Paulo, SP. Abstract... São Paulo, SP: Instituto de Pesquisas Energéticas e Nucleares, 2017. p. 19-19. Disponível em: http://repositorio.ipen.br/handle/123456789/28711. Acesso em: 20 Mar 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.