Qualitative and quantitative analysis of mixtures of surface‐active agents with special reference to synthetic detergents

Summary An identification scheme for surface‐active agents is given which enables these agents or their mixtures to be detected in commercial products. Use is made of the acid resistance of the various types, which make it possible to separate the different compounds step by step from the mixture. An important feature of the method is that it can be used also for quantitative analyses by weighing the extraction residues obtained and determining their physical and chemical constants.