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| Registros recuperados : 79 | |
| Registros recuperados : 79 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
26/02/2018 |
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Data da última atualização: |
13/11/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
SANTOS, C. S. da; SOUZA, G. B. de; NOGUEIRA, A. R. de A. |
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Afiliação: |
Caroline Santos da Silva, UFSCar; GILBERTO BATISTA DE SOUZA, CPPSE; ANA RITA DE ARAUJO NOGUEIRA, CPPSE. |
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Título: |
Preparation and characterization of phosphate rock as quality control material. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Accreditation and Quality Assurance, v.23, p.39-45, 2018. |
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DOI: |
https://doi.org/10.1007/s00769-017-1295-3 |
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Idioma: |
Inglês |
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Conteúdo: |
A quality control material for inorganic constituents present in a phosphate-bearing rock used to manufacture phosphate fertilizers was produced and characterized according to the ISO Guide 80. The evaluation of the estimated minimum mass, homogeneity, and stability of the material was performed using microwave-assisted digestion and inductively coupled plasma optical emission spectrometry (ICP-OES) as an in-house validated technique for determination of Al, As, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, V, and Zn. Phosphorus mass fraction determination was done by laser-induced breakdown spectroscopy. The accuracy of the measurement results was confirmed by analyzing the certified phosphate rock and fertilizer certified reference materials according to NIST SRM 694 and SRM 695. One-way analysis of variance (ANOVA) was applied to the measurement data, and the homogeneity and stability of the material presented averages within the 95 % confidence interval. The results from the preparation and with collaborative trial allowed the calculation and estimation of the consensus value and its expanded measurement uncertainties, obtained by combining the uncertainty contributions from characterization (uchar), between-bottle homogeneity (ubb), short-term stability (usts), and long-term stability (ults) for each evaluated analyte mass fraction. |
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Palavras-Chave: |
Análises de variância; ICP-OES; Incerteza; Material de controle de qualidade. |
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Thesagro: |
Rocha fosfatada. |
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Thesaurus NAL: |
Rock phosphate. |
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Categoria do assunto: |
W Química e Física |
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Marc: |
LEADER 02074naa a2200229 a 4500
001 2088126
005 2018-11-13
008 2018 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/s00769-017-1295-3$2DOI
100 1 $aSANTOS, C. S. da
245 $aPreparation and characterization of phosphate rock as quality control material.$h[electronic resource]
260 $c2018
520 $aA quality control material for inorganic constituents present in a phosphate-bearing rock used to manufacture phosphate fertilizers was produced and characterized according to the ISO Guide 80. The evaluation of the estimated minimum mass, homogeneity, and stability of the material was performed using microwave-assisted digestion and inductively coupled plasma optical emission spectrometry (ICP-OES) as an in-house validated technique for determination of Al, As, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, V, and Zn. Phosphorus mass fraction determination was done by laser-induced breakdown spectroscopy. The accuracy of the measurement results was confirmed by analyzing the certified phosphate rock and fertilizer certified reference materials according to NIST SRM 694 and SRM 695. One-way analysis of variance (ANOVA) was applied to the measurement data, and the homogeneity and stability of the material presented averages within the 95 % confidence interval. The results from the preparation and with collaborative trial allowed the calculation and estimation of the consensus value and its expanded measurement uncertainties, obtained by combining the uncertainty contributions from characterization (uchar), between-bottle homogeneity (ubb), short-term stability (usts), and long-term stability (ults) for each evaluated analyte mass fraction.
650 $aRock phosphate
650 $aRocha fosfatada
653 $aAnálises de variância
653 $aICP-OES
653 $aIncerteza
653 $aMaterial de controle de qualidade
700 1 $aSOUZA, G. B. de
700 1 $aNOGUEIRA, A. R. de A.
773 $tAccreditation and Quality Assurance$gv.23, p.39-45, 2018.
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