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ISO 3196:1975

Sodium hydroxide for industrial use — Determination of carbonates content — Titrimetric method
1. 5. 1975.

Опште информације

90.93     20. 10. 2023.

ISO

ISO/TC 47

Međunarodni standard

71.060.40  

francuski   engleski  

Kupovina

Objavljen

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Apstrakt

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.

Životni ciklus

TRENUTNO

OBJAVLJEN
ISO 3196:1975
90.93 Odluka o potvrđivanju standarda
20. 10. 2023.

Nacionalna preuzimanja

SRPS ISO 3196:2016  
ISS

Natrijum-hidroksid za industrijsku upotrebu – Određivanje sadržaja karbonata – Volumetrijska metoda

90.93   Odluka o potvrđivanju standarda

H047 Saznaj više

SRPS H.B8.663:1992  
ISS

Natrijum-hidroksid za industrijsku upotrebu - Određivanje sadržaja karbonata - Volumetrijska metoda

95.99   Povučen

H047 Saznaj više