International Standard
ISO 3431:1976
Sodium fluoride primarily used for the production of aluminium — Determination of soluble sulphates content — Turbidimetric method
Reference number
ISO 3431:1976
ISO 3431:1976
Edición 1
1976-07
1976-07
© ISO 2024
International Standard
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ISO 3431:1976
8747
No disponible en español
Publicado
(Edición 1, 1976)
Esta norma se revisó y confirmó por última vez en 2022.
Por lo tanto, esta versión es la actual.
Resumen
Applicable to products having SO4 contents of more than 0.05 % (m/m). Covers the dissolution of the test portion in hydrochloric acid and evaporation in hydrochloric acid solution for drying. Dissolution of the residue in a hydrochloric acid solution. Measurement of the turbidity obtained by precipitation, under specified conditions, of barium sulphate using a spectrophotometer at a wavelength of about 470 nm or a photoelectric absorptiometer.
Informaciones generales
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Estado: PublicadoFecha de publicación: 1976-07Etapa: Norma Internacional confirmada [90.93]
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Edición: 1Número de páginas: 3
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Comité Técnico :ISO/TC 226ICS :71.100.10
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