International Standard
ISO 979:1974
Sodium hydroxide for industrial use — Method of assay
Reference number
ISO 979:1974
Edición 1
1974-12
International Standard
Vista previa
ISO 979:1974
5417
No disponible en español
Publicado (Edición 1, 1974)
Esta norma se revisó y confirmó por última vez en 2023. Por lo tanto, esta versión es la actual.

ISO 979:1974

ISO 979:1974
5417
Idioma
Formato
CHF 42
Convertir Franco suizo (CHF) a tu moneda

Resumen

Method for determination of the titre; this is expressed conventionally as percentages by mass of NaOH, a) as total alkalinity and b) as caustic alkalinity, corresponding to the total alkalinity less the alkalinity due to carbonates. The principle consists in titration of the total alkalinity with standard volumetric hydrochloric acid solution in the presence of methyl orange as indicator. Calculation of the two amounts a) and b). The mass of carbon dioxide is determined by the method specified in ISO 3196. This method has also been approved by the IUPAC. - Cancels and replaces ISO Recommendation R 979-1969 of which it constitutes a technical revision.

Informaciones generales

  •  : Publicado
     : 1974-12
    : Norma Internacional confirmada [90.93]
  •  : 1
     : 2
  • ISO/TC 47
    71.060.40 
  • RSS actualizaciones

Got a question?

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)