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ISO 979:1974

Sodium hydroxide for industrial use -- Method of assay

Üldinfo
Kehtiv alates 01.12.1974
Tegevusala (ICS grupid)
71.060.40 Alused
Direktiivid või määrused
puuduvad
Standardi ajalugu
Staatus
Kuupäev
Tüüp
Nimetus
01.12.1974
Põhitekst
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.
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ISO 981:1973

Sodium hydroxide for industrial use -- Determination of chloride content -- Mercurimetric method
Uusim versioon Kehtiv alates 01.02.1973
Põhitekst

ISO 3196:1975

Sodium hydroxide for industrial use -- Determination of carbonates content -- Titrimetric method
Uusim versioon Kehtiv alates 01.05.1975
Põhitekst

EVS-EN ISO 22301:2014

Ühiskondlik turvalisus. Talitluspidevuse juhtimissüsteem. Nõuded
Kehtetu alates 02.12.2019