ISO 2871-2:2010规定了一种测定低分子量阳离子活性材料的方法，如单胺类、胺氧化物、季铵盐化合物和烷基吡啶盐，其主链由10到22个碳原子组成，阳离子中的其他碳原子不超过6个。该方法也适用于其他阳离子活性材料。 该方法适用于活性物质的固体或水溶液。如果存在阴离子和/或两性表面活性剂，则该方法不适用。

ISO 2871-2:2010 specifies a method for the determination of low-molecular-mass cationic-active materials such as monoamines, amine oxides, quaternary ammonium compounds and alkyl-pyridinium salts which have a main chain of 10 to 22 carbon atoms and not more than 6 other carbon atoms in the cation. The method is also suitable for other cationic-active materials. The method is applicable to solids or to aqueous solutions of the active material. The method is not applicable if anionic and/or amphoteric surface active agents are present.