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ISO 979:1974

Sodium hydroxide for industrial use — Method of assay
1. 12. 1974.

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

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.

Životni ciklus

TRENUTNO

OBJAVLJEN
ISO 979:1974
90.93 Odluka o potvrđivanju standarda
20. 10. 2023.

Nacionalna preuzimanja

SRPS ISO 979:2016  
ISS

Natrijum-hidroksid za industrijsku upotrebu – Metoda analize

90.93   Odluka o potvrđivanju standarda

H047 Saznaj više

SRPS H.B8.661:1992  
ISS

Natrijum-hidroksid za industrijsku upotrebu - Određivanje sadržaja natrijum-hidroksida - Volumetrijska metoda

95.99   Povučen

H047 Saznaj više