Norm

ISO 3196:1975 en

Sodium hydroxide for industrial use - Determination of carbonates content - Titrimetric method

31,57

Over deze norm

Status Definitief
Aantal pagina's 4
Gepubliceerd op 01-05-1975
Taal Engels
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.

Details

ICS-code 71.060.40
Nederlandse titel Sodium hydroxide for industrial use - Determination of carbonates content - Titrimetric method
Engelse titel Sodium hydroxide for industrial use - Determination of carbonates content - Titrimetric method

Winkelwagen

Subtotaal:

Ga naar winkelwagen