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
Published
(Edition 2, 1989)
This publication was last reviewed and confirmed in 2021.
Therefore this version remains current.
Abstract
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.
Life cycle
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Previously
WithdrawnISO 2270:1972
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Now
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