Reference number
ISO 1388-9:1981
ISO 1388-9:1981
© ISO 2024
International Standard
ISO 1388-9:1981
Ethanol for industrial use — Methods of test — Part 9: Determination of esters content — Titrimetric method after saponification
Edition 1
1981-12
1981-12
ISO 1388-9:1981
5951
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 esters contents in the range 0.005 % (m/m) to 0.15 % (m/m). The principle consists in the saponification of esters present in a test portion by boiling with excess standard volumetric sodium hydroxide solution; determination of the residual sodium hydroxide, and hence the amount used for saponification, by titration with standard volumetric hydrochloric acid solution in the presence of phenolphthalein 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
-
Previously
WithdrawnISO/R 1388:1970
-
Now