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

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dc.contributor.authorBahia Filho, Oscar [UNESP]
dc.contributor.authorMoreno, Maria Margarita Torres [UNESP]
dc.contributor.authorNardy, Antonio José Ranalli [UNESP]
dc.contributor.authorDe Oliveira, Marcos Aurélio Farias [UNESP]
dc.contributor.authorDa Silva, José Ângelo Ferreira [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-04-28T19:56:05Z
dc.date.available2022-04-28T19:56:05Z
dc.date.issued1996-12-01
dc.description.abstractThe 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.en
dc.description.affiliationDepartamento de Petrologia Inst. de Geociencias e Cie. Exatas UNESP, 13500-230 - Rio Claro - SP
dc.description.affiliationUnespDepartamento de Petrologia Inst. de Geociencias e Cie. Exatas UNESP, 13500-230 - Rio Claro - SP
dc.format.extent19-42
dc.identifier.citationEcletica Quimica, v. 21, n. 0, p. 19-42, 1996.
dc.identifier.issn0100-4670
dc.identifier.scopus2-s2.0-0043220871
dc.identifier.urihttp://hdl.handle.net/11449/224359
dc.language.isopor
dc.relation.ispartofEcletica Quimica
dc.sourceScopus
dc.subjectAnalytical geochemistry
dc.subjectDissolution of geological matrix
dc.subjectInductively coupled plasma atomic emission spectrometry
dc.subjectSilicate rock analysis
dc.subjectUltrassonic nebulization
dc.titleOtimização do procedimento de solubilização de rochas silicáticas em recipientes abertos para análise por ICP-AESpt
dc.title.alternativeProcedure optimization of silicate rocks dissolution in open vissels for ICP-AES analysisen
dc.typeArtigo

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Artigos - Petrologia e Metalogenia - IGCE