Reference number
ISO 2270:1989
ISO 2270:1989
© ISO 2024
International Standard
ISO 2270:1989
Non-ionic surface active agents — Polyethoxylated derivatives — Iodometric determination of oxyethylene groups
Edition 2
1989-08
1989-08
ISO 2270:1989
7092
Publicado
(Edición 2, 1989)
Esta publicación se revisó y confirmó por última vez en 2021.
Por lo tanto, esta versión es la actual.
Resumen
The sample is hydrolyzed by nascent hydroiodic acid. The iodine liberated is titrated with a standard volumetric sodium thiosulfate solution. The method is applicable to the analysis of polyethoxylated derivatives of primary saturated fatty alcohols, oleyl alcohol, satureted fatty acids, straight and branched chain alkylphenols. It is not applicable in the present of compounds containing sulfur or nitrogen, compounds containing oxypropylene group, aldehydes or acetals, sterols and derivatives.
Ciclo de vida
-
Anteriormente
RetiradaISO 2270:1972
-
Ahora