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
Publicado
(Edición 1, 1981)
Esta publicación se revisó y confirmó por última vez en 2023.
Por lo tanto, esta versión es la actual.
Resumen
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.
Ciclo de vida
-
Anteriormente
RetiradaISO/R 1388:1970
-
Ahora