WALTER DOS REIS PEDREIRA FILHO
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Artigo IPEN-doc 11702 Trace amounts of rare earth elements in high purity samarium oxide by sector field inductively coupled plasma mass spectrometry after separation by HPLC2006 - PEDREIRA, W.R.; QUEIROZ, C.A.; ABRAO, ALCIDIO; ROCHA, SORAYA M.; VASCONCELLOS, MARI E. de; BOAVENTURA, G.R.; PIMENTEL, M.M.Artigo IPEN-doc 08604 Determination of trace amounts of rare earth elements in high pure lanthanum oxide by sector field inductively coupled plasma mass spectrometry (HR ICP-MS) and high-performance liquid chromatography (HPLC) techniques2002 - PEDREIRA FILHO, W.R.; SARKIS, J.E.S.; RODRIGUES, C.; TOMIYOSHI, I.A.; QUEIROZ, C.A.S.; ABRAO, A.Artigo IPEN-doc 11701 Enrichment of yttrium from rare earth concentrate by ammonium carbonate leaching and peroxide precipitation2006 - VASCONCELLOS, MARI E. de; ROCHA, SORAYA M.R. da; PEDREIRA FILHO, WALTER dos R.; QUEIROZ, CARLOS A. da S.; ABRAO, ALCIDIO