Uncertainty estimation in the determination of metals in superficial water by ICP-OES

[摘要] From 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.

[发布机构] Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN/SP), Cidade Universitária, Avenida Lineu Prestes, 2242, São Paulo; SP; 05508-000, Brazil^1

[关键词] Analytical curves;Measurement uncertainty;Optical emission spectrometry;Recovery methods;Superficial water;Uncertainty contributions;Uncertainty estimation;Validation study