FAUSTINO, MAINARA G.MARQUES, JOYCE R.MONTEIRO, LUCILENA R.STELLATO, THAMIRIS B.SOARES, SABRINA M.V.SILVA, TATIANE B.S.C.SILVA, DOUGLAS B. daPIRES, MARIA A.F.COTRIM, MARYCEL E.B.2017-03-202017-03-20FAUSTINO, MAINARA G.; MARQUES, JOYCE R.; MONTEIRO, LUCILENA R.; STELLATO, THAMIRIS B.; SOARES, SABRINA M.V.; SILVA, TATIANE B.S.C.; SILVA, DOUGLAS B. da; PIRES, MARIA A.F.; COTRIM, MARYCEL E.B. Uncertainty estimation in the determination of metals in superficial water by ICP-OES. In: BRAZILIAN CONGRESS ON METROLOGY, 8th, 29 de novembro - 04 de dezembro, 2015, Bento Gonçalves, RS. <b>Proceedings...</b> p. 1-8. Disponível em: http://repositorio.ipen.br/handle/123456789/27217.http://repositorio.ipen.br/handle/123456789/27217From validation studies, it was possible to estimate a measurement uncertainty of several elements such as Al, Ba, Ca, Cu, Cr, Cd, Fe, Mg, Mn, Ni and K in water samples from Guarapiranga Dam. These elements were analyzed by optical emission spectrometry with inductively coupled plasma (ICP-OES). The value of relative estimated uncertainties were between 3% and 15%. The greatest uncertainty contributions were analytical curve, and the recovery method, which were related with elements concentrations and the equipment response. Water samples analyzed were compared with CONAMA Resolution #357/2005.1-8openAccessaluminiumcalciumcomparative evaluationsconcentration ratiocopperdiagramsemissionemission spectroscopyironmagnesiummulti-element analysisnickelpotassiumpyrazolinesresolutionvalidationwaterTexto completo de eventohttps://orcid.org/0000-0002-6462-4758