Otimização do procedimento de solubilização de rochas silicáticas em recipientes abertos para análise por ICP-AES

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorBahia Filho, Oscar-
Autor(es): dc.creatorMoreno, Maria Margarita Torres-
Autor(es): dc.creatorNardy, Antonio José Ranalli-
Autor(es): dc.creatorDe Oliveira, Marcos Aurélio Farias-
Autor(es): dc.creatorDa Silva, José Ângelo Ferreira-
Data de aceite: dc.date.accessioned2025-08-21T18:28:19Z-
Data de disponibilização: dc.date.available2025-08-21T18:28:19Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued1996-12-01-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/224359-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/224359-
Descrição: dc.descriptionThe main variables found on procedure of the dissolution silicate rocks using acid dissolution in teflon open vessel for analysis of micro elements by ICP-AES has been determined. The results obtained for some samples showed strong dependence of the rock mineralogical composition, then it was recommended an alkaline fusion step after acid dissolution. The decomposition procedure use 20 ml of an acid mixture of HF:HNO3 in the proportion 3:1 for a fraction of 250 mg pulverized sample. The recommended temperatures were 60°C for attack and 90°C for acid volatilization. The fusion step with 50 mg LiBO2 at 1000°C may be used if non-attacked residue is observed in the solution. The whole time was 6 h per sample. Nine types os silicate rocks that show mineralogical and chemical different compositions were chosen for obtaining the optimization of the variables. The elements used were Ce, Y, Yb and Zr. In addition, ultrassonic nebulization has been used. The percentual standard deviations obtained for five determinations were 0.7 and 1.4 for triplicate samples. The mineralogical and textural information from the petrographical analysis of the samples indicated the need of increasing the fusion step on the optimized procedure.-
Descrição: dc.descriptionDepartamento de Petrologia Inst. de Geociencias e Cie. Exatas UNESP, 13500-230 - Rio Claro - SP-
Descrição: dc.descriptionDepartamento de Petrologia Inst. de Geociencias e Cie. Exatas UNESP, 13500-230 - Rio Claro - SP-
Formato: dc.format19-42-
Idioma: dc.languagept_BR-
Relação: dc.relationEcletica Quimica-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAnalytical geochemistry-
Palavras-chave: dc.subjectDissolution of geological matrix-
Palavras-chave: dc.subjectInductively coupled plasma atomic emission spectrometry-
Palavras-chave: dc.subjectSilicate rock analysis-
Palavras-chave: dc.subjectUltrassonic nebulization-
Título: dc.titleOtimização do procedimento de solubilização de rochas silicáticas em recipientes abertos para análise por ICP-AES-
Título: dc.titleProcedure optimization of silicate rocks dissolution in open vissels for ICP-AES analysis-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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