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SRPS ISO 979:2016

Sodium hydroxide for industrial use — Method of assay

May 31, 2016
May 31, 2016

General information

90.93     Oct 20, 2023

90.20    Oct 15, 2028

ISS

H047

International Standard

71.060.40  

Serbian  

Plan za 2013. godinu.

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
SRPS H.B8.661:1992

NOW

PUBLISHED
SRPS ISO 979:2016
90.93 Standard confirmed
Oct 20, 2023

Related project

Adopted from ISO 979:1974