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AbstractAbstract
[en] The nitrate content of thorium nitrate solutions is determined with a liquid membrane nitrate selective electrode utilizing the known addition method in 0.1 M potassium fluoride medium as ionic strength adjustor. It is studied the influence of pH and the presence of chloride, sulphate, phosphate, meta-silicate, thorium, rare earths, iron, titanium, uranium and zirconium at the same concentrations as for the aqueous feed solutions in the thorium purification process. The method is tested in synthetic samples and in samples proceeding from nitric dissolutions of thorium hidroxide and thorium oxicarbonate utilized as thorium concentrates to be purified
[pt]
Determina-se o conteudo total de nitrato em solucoes de nitrato de torio com eletrodo seletivo de nitrato de membrana liquida pelo metodo da adicao conhecida em meio de ajustador de forca ionica de fluoreto de potassio 0.1 M. Estudou-se a influencia do pH e da presenca de cloreto, sulfato, fosfato, meta-silicato, torio, terras raras, ferro, titanio, uranio e zirconio, nas mesmas concentracoes das solucoes aquosas de alimentacao no processo de purificacao do torio. Experimentou-se o metodo em amostras sinteticas e em amostras provenientes da dissolucao nitrica de hidroxido de torio e oxicarbonato de torio usados como concentrados de torio a ser purificadoOriginal Title
Determinacao do conteudo total de nitrato em solucoes de torio por meio de eletrodo seletivo
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Source
IEA Dissertacao e Tese; no. 124; Feb 1979; 50 p; Tese (M.Sc.).
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Report
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Thesis/Dissertation
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