Procedure optimization of silicate rocks dissolution in open vessels for ICP-AES analysis.

dc.contributor.authorBahia, O.
dc.contributor.authorMoreno, MMT
dc.contributor.authorNardy, AJR
dc.contributor.authordeOliveira, MAF
dc.contributor.authordaSilva, J. A.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:29:29Z
dc.date.available2014-05-20T15:29:29Z
dc.date.issued1996-01-01
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 mi 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 degrees C for attack and 90 degrees C for acid volatilization. The fusion step with 50 mg LiBO2 at 1000 degrees 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.affiliationUNESP,INST GEOCIENCIAS & CIENCIAS EXATAS,DEPT PETROL & METALOGENIA,BR-13500230 RIO CLARO,SP,BRAZIL
dc.description.affiliationUnespUNESP,INST GEOCIENCIAS & CIENCIAS EXATAS,DEPT PETROL & METALOGENIA,BR-13500230 RIO CLARO,SP,BRAZIL
dc.format.extent19-42
dc.identifierhttp://www.scielo.br/scielo.php?script=sci_issues&pid=0100-4670
dc.identifier.citationEcletica Química. São Paulo: Editora Unesp, v. 21, p. 19-42, 1996.
dc.identifier.issn0100-4670
dc.identifier.lattes5429929936266082
dc.identifier.urihttp://hdl.handle.net/11449/39071
dc.identifier.wosWOS:A1996WH62900002
dc.language.isopor
dc.publisherEditora Unesp
dc.relation.ispartofEclética Química
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectinductively coupled plasma atomic emission spectrometrypt
dc.subjectultrasonic nebulizationpt
dc.subjectsilicate rock analysispt
dc.subjectdissolution of geological matrixpt
dc.subjectanalytical geochemistrypt
dc.titleProcedure optimization of silicate rocks dissolution in open vessels for ICP-AES analysis.en
dc.typeArtigo
dcterms.licensehttp://www.scielo.br/revistas/eq/paboutj.htm
dcterms.rightsHolderEditora Unesp
unesp.author.lattes5429929936266082
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Geociências e Ciências Exatas, Rio Claropt
unesp.departmentPetrologia e Metalogenia - IGCEpt

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