MARCOS ANTONIO HORTELLANI
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Artigo IPEN-doc 22844 Proficiency testing pilot for determination of total mercury in fresh fish2016 - SANTANA, L.V. de; SARKIS, J.E.S.; ULRICH, J.C.; HORTELLANI, M.A.A proficiency-testing scheme concerning total mercury determination in fish tissue involved 10 laboratories as participants, who used their regular in-house analytical methods, and the assigned value and the standard deviation used in proficiency testing program was derived from calibration against the certified reference values of the CRMs. The majority of participants obtained satisfactory Z-scores, and laboratories that need to revise their procedures were singled out. The objective these exercises were makes a useful contribution towards the production of proficiency test in Brazil. The uncertainty expanded calculated for the reference material was 22%.Artigo IPEN-doc 19344 Development of reference material for proficiency tests: arsenic fish tissue2013 - SANTANA, LUCIANA V. de; SARKIS, JORGE E.S.; ULRICH, JOAO C.; HORTELLANI, MARCOS A.Artigo IPEN-doc 17181 How the estimation of uncertainty can be helpful for the determination of Cu and Zn serum samples2011 - SANTANA, LUCIANA V. de; SARKIS, JORGE E.S.; BERNARDES, SUENE; ULRICH, JOAO C.; HORTELLANI, MARCOS A.; TABACNIKS, MANFREDO H.Artigo IPEN-doc 17172 Estimate of uncertainty of measurement in the determination of Zn, Cu, Hg and Pb in fish muscle2011 - SANTANA, LUCIANA V. de; SARKIS, JORGE E.S.; AZEVEDO, JULIANA de S.; ULRICH, JOAO C.; HORTELLANI, MARCOS A.