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

8th Brazilian Congress on Metrology

Faustino, Mainara G.^1 ; Marques, Joyce R.^1 ; Monteiro, Lucilena R.^1 ; Stellato, Thamiris B.^1 ; Soares, Sabrina M. V.^1 ; Silva, Tatiane B. S. C.^1 ; Da Silva, Douglas B.^1 ; Pires, Maria Aparecida F.^1 ; Cotrim, Marycel E. B.^1

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;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/733/1/012032/pdf
DOI  :  10.1088/1742-6596/733/1/012032

来源: IOP

【 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.