Reference number
ISO 1388-4:1981
ISO 1388-4:1981
© ISO 2025
International Standard
ISO 1388-4:1981
Ethanol for industrial use — Methods of test — Part 4: Estimation of content of carbonyl compounds present in moderate amounts — Titrimetric method
Edition 1
1981-12
1981-12
ISO 1388-4:1981
5946
Published
(Edition 1, 1981)
This publication was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
The method is applicable to products having carbonyl compounds contents equal to or greater than 0.01 % (m/m). The method only allows determination of those carbonyl compounds which react under the specified conditions. The principle is based on the reaction of hydroxylammonium chloride with the carbonyl compounds in a test portion and titration of the hydrochloric acid formed with standard volumetric sodium hydroxide solution, in the presence of bromophenol blue as indicator. - International Standards ISO 1388/1 to ISO 1377/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a technical revision.
Life cycle
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Previously
WithdrawnISO/R 1388:1970
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Now