ISO 2270:1989

Current Revision
Non-ionic surface active agents -- Polyethoxylated derivatives -- Iodometric determination of oxyethylene groups

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ISO 2270:1989

Non-ionic surface active agents -- Polyethoxylated derivatives -- Iodometric determination of oxyethylene groups

PUBLISH DATE 1989
ISO 2270:1989

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,
  • saturated fatty acids,
  • straight and branched chain alkylphenols.

It is not applicable in the presence of compounds containing sulfur or nitrogen, compounds containing oxypropylene group, aldehydes or acetals, sterols and derivatives.

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