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Surface active agents -- Detergents -- Anionic-active matter hydrolyzable under alkaline conditions -- Determination of hydrolyzable and non-hydrolyzable anionic-active matter
The determination is carried out as follows:
Titration of an aliquot portion of a sample solution with benzethonium chloride solution according to the direct two-phase titration procedure described in ISO 2271.
Hydrolysis by refluxing under alkaline conditions of a second aliquot portion of the sample solution.
Titration of unhydrolyzed anionic-active matter with benzethonium chloride solution as before.
Calculation of the contents of hydrolyzable and non-hydrolyzable anionic-active matter from the results obtained.
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