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See Chinese contents: GB/T 5173-2018 GB/T 5173-2018: Surface active agents -- Detergents -- Determination of anionic-active matter content -- Direct two-phase titration procedure
This Standard specifies the direct two-phase titration procedure for determination of anionic-active matter content of anionic surface active agents and detergents. This Standard applies to the analysis of alkyl benzene sulfonate, alkyl sulfonate, alkyl sulfate, alkyl hydroxy sulfate, alkylphenol sulfate, fatty alcohol methoxy and ethoxy sulfate, dialkyl succinate sulfonate and ??-sodium alkenyl sulfonate, and solid or liquid products of other anionic-active matters with one hydrophilic group per molecule.
