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

Publication date:   Dec 1, 1981

General information

90.93 Standard confirmed   Mar 15, 2018


ISO/TC 47 Chemistry

International Standard

71.080.60   Alcohols. Ethers



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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


ISO/R 1388:1970


ISO 1388-4:1981
90.93 Standard confirmed
Mar 15, 2018