ISO 4318:1989

Current Revision
Surface active agents and soaps -- Determination of water content -- Azeotropic distillation method

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ISO 4318:1989

Surface active agents and soaps -- Determination of water content -- Azeotropic distillation method

PUBLISH DATE 1989
ISO 4318:1989

The water in a test portion is removed by **azeotropic distillation** with boiling xylene or petroleum. The volume of the water collected is measured.

The method is applicable to products in the form of powders having water contents greater than 5% (m/m), and in the form of pastes and solutions.

It is *not applicable* to samples containing water-soluble volatile compounds, for example, ethanol.

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