Reference number
ISO 1388-2:1981
ISO 1388-2:1981
© ISO 2024
International Standard
ISO 1388-2:1981
Ethanol for industrial use — Methods of test — Part 2: Detection of alkalinity or determination of acidity to phenolphthalein
Edition 1
1981-11
1981-11
ISO 1388-2:1981
5944
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 acidities equal to or greater than 0.0008 % (m/m). The principle consists in the dilution of a test portion with carbon dioxide-free water, checking whether the test solution is alkaline or acid to phenolphthalein, and, if appropriate, determination of the acidity by titration with standard volumetric sodium hydroxide solution. The acidity is expressed as a percentage by mass of acetic acid. - International Standards ISO 1388/1 to 1388/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a technical revision.
Life cycle
-
Previously
WithdrawnISO/R 1388:1970
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Now