International Standard
ISO 3196:1975
Sodium hydroxide for industrial use — Determination of carbonates content — Titrimetric method
Reference number
ISO 3196:1975
Edición 1
1975-05
International Standard
Vista previa
ISO 3196:1975
8393
No disponible en español
Publicado (Edición 1, 1975)
Esta norma se revisó y confirmó por última vez en 2023. Por lo tanto, esta versión es la actual.

ISO 3196:1975

ISO 3196:1975
8393
Idioma
Formato
CHF 42
Convertir Franco suizo (CHF) a tu moneda

Resumen

Applicable to products having contents, expressed as CO2 , of more than 0.01 % (m/m). Relates to a procduct containing neither sulphides nor chlorates or only sulphides or only chlorates. Preliminary test by boiling an acidified test sample in the presence of methyl orange and with a lead acetate paper strip in the vapour. The sulphides blacken the paper and chlorates delolourize the methyl orange. Products containing neither sulphides nor chlorates: liberation of carbon dioxide by acidification and heating. Entrainment in a flow of gas and absorption in an excess of barium hydroxide solution. Titration of the excess barium hydroxide solution with a standard volumetric hydrochloric acid solution in the presence of thymolphthalein as indicator.

Informaciones generales

  •  : Publicado
     : 1975-05
    : Norma Internacional confirmada [90.93]
  •  : 1
     : 4
  • ISO/TC 47
    71.060.40 
  • RSS actualizaciones

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