scope:

This International Standard specifies a manual or mechanical method for the determination of anionic-active matter present in detergents. The method is applicable to solids or to aqueous solutions of the active material. The relative molucular mass of the anionic active matter has to be known. The method is not applicable if cationic surface of active agents are present. The manual method is thus applicable to the determination of alkylbenzene sulfonates; alkane sulfonates; sulfates and hydroxysulfates; alkylphenol sulfates; fatty alcohol methoxy and ethoxysulfates; dialkylsulfosuccinates and other active materials containing one hydrophilic group per molecule. The mechanical method is applicable to all the abovementioned products provided it gives comparable with those obtained using the manual method.