dc.contributorUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:29:29Z
dc.date.accessioned2022-10-05T16:54:17Z
dc.date.available2014-05-20T15:29:29Z
dc.date.available2022-10-05T16:54:17Z
dc.date.created2014-05-20T15:29:29Z
dc.date.issued1996-01-01
dc.identifierEcletica Química. São Paulo: Editora Unesp, v. 21, p. 19-42, 1996.
dc.identifier0100-4670
dc.identifierhttp://hdl.handle.net/11449/39071
dc.identifierWOS:A1996WH62900002
dc.identifier5429929936266082
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3910260
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.
dc.languagepor
dc.publisherEditora Unesp
dc.relationEclética Química
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectinductively coupled plasma atomic emission spectrometry
dc.subjectultrasonic nebulization
dc.subjectsilicate rock analysis
dc.subjectdissolution of geological matrix
dc.subjectanalytical geochemistry
dc.titleProcedure optimization of silicate rocks dissolution in open vessels for ICP-AES analysis.
dc.typeArtigo


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