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Preparation and characterization of phosphate rock as quality control material. Repositório Alice
SANTOS, C. S. da; SOUZA, G. B. de; NOGUEIRA, A. R. de A..
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...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Material de controle de qualidade; ICP-OES; Análises de variância; Incerteza; Rocha fosfatada; Rock phosphate.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1088126
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