ISO 2871-2:2010规定了一种用于测定低分子量阳离子活性材料如单胺，氧化胺，季铵化合物和烷基 - 吡啶鎓盐的方法，所述低分子量阳离子活性材料具有10-22个碳原子的主链，而不是阳离子中有6个以上的其他碳原子。该方法也适用于其它阳离子活性物质。 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.