Portaria n.º 322/77, de 01 de Junho de 1977
Portaria n.º 322/77 de 1 de Junho Manda o Governo da República Portuguesa, pelo Ministro da Indústria e Tecnologia, nos termos do n.º 2 do artigo 4.º do Estatuto de Normalização Portuguesa (Decreto-Lei n.º 38801, de 25 de Junho de 1952, modificado pelo Decreto-Lei n.º 48454, de 25 de Junho de 1968), com a nova redacção que lhe foi dada pelo Decreto-Lei n.º 117/75, de 8 de Março, aprovar como normas definitivas os estudos E-1851, E-1852, E-1855, E-1860 e E-1863, com as alterações propostas nos respectivos pareceres do Conselho de Normalização e com os números e títulos seguintes: NP-1471 - Ácido sulfúrico e ácido sulfúrico fumante para usos industriais.
Determinação do teor de dióxido de enxofre. Método iodométrico.
NP-1472 - Ácido fosfórico para usos industriais. Determinação do teor de cálcio.
Métodovolumétrico.
NP-1473 -...
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