Evaluation of Ir and Pd(NO3)2/Mg(NO3) 2 as modifiers for the simultaneous determination of Mn, Ni, Pb, and Sb in fuel ethanol by graphite furnace AAS

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorNeves, Denise Regina-
Autor(es): dc.creatorOliveira, Silvana Ruella-
Autor(es): dc.creatorRêgo, Jardes Figuerêdo Do-
Autor(es): dc.creatorFlumignan, Ddjkilo Luiz-
Autor(es): dc.creatorOliveira, José Eduardo-
Autor(es): dc.creatorNeto, José Anchieta Gomes-
Data de aceite: dc.date.accessioned2025-08-21T16:20:29Z-
Data de disponibilização: dc.date.available2025-08-21T16:20:29Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2010-07-01-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/231945-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/231945-
Descrição: dc.descriptionThe mixture Pd(NO3)2/ Mg(NO3)2 and an Ir-coated platform co-injected with Pd(NO3)2/ Mg(NO3)2 were evaluated as modifiers for the direct and simultaneous determination of Mn, Ni, Pb, and Sb in fuel ethanol by graphite furnace atomic absorption spectrometry. For a 20-μL diluted sample dispensed onto the platform of graphite tube in the presence of 5 μg Pd and 3 μg Mg, analytical curves in the 0 - 50.0 Mg L-1 range were built up resulting in linear correlation coefficients better than 0.99. The calculated characteristic masses were 6 pg Mn, 25 pg Ni, 67 pg Pb, and 50 pg Sb. The limits of detection (LOD) were 0.13 Mg L' Mn, 1.2 pg L-1 Ni, 1.2 Mg L' Pb, and 0.10 Mg L-1 Sb. Accuracy was checked after the analysis of 10 commercial fuel ethanol samples. The results were in agreement at a 95% confidence level (paired Mest) with those obtained by inductively coupled plasma mass spectrometry. The recovery of Mn, Ni, Pb, and Sb in fuel ethanol samples was within the 97-104%, 86-116%, 83-119%, and 92-104% intervals, respectively, and the relative standard deviation (n = 12) was typically 4%, 7%, 6%, and 5%, respectively. The useful lifetime of the THGA atomizer was around 300 firings.-
Descrição: dc.descriptionUNESP Univ Estadual Paulista Institute of Chemistry, P.O. Box 355, 14801-970, Araraquara - SP-
Descrição: dc.descriptionUNESP Univ Estadual Paulista Institute of Chemistry, P.O. Box 355, 14801-970, Araraquara - SP-
Formato: dc.format141-146-
Idioma: dc.languageen-
Relação: dc.relationAtomic Spectroscopy-
???dc.source???: dc.sourceScopus-
Título: dc.titleEvaluation of Ir and Pd(NO3)2/Mg(NO3) 2 as modifiers for the simultaneous determination of Mn, Ni, Pb, and Sb in fuel ethanol by graphite furnace AAS-
Tipo de arquivo: dc.typelivro digital-
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