ISO 2871-1:2010规定了用于测定高分子量阳离子活性材料的方法，例如季铵化合物，其中两个烷基各自含有10个或更多个碳原子，例如。二硬脂基 - 二甲基 - 氯化铵，或其中长链酰基氨基乙基和烷基分别在1位和2位上被取代的咪唑啉或3-甲基咪唑啉的盐。 该方法适用于活性物质的固体或水溶液。如果存在阴离子表面活性剂，该方法不适用

ISO 2871-1:2010 specifies a method for the determination of high-molecular-mass cationic-active materials such as quaternary ammonium compounds in which two of the alkyl groups each contain 10 or more carbon atoms, e.g. distearyl-dimethyl-ammonium chlorides, or salts of imidazoline or 3-methylimidazoline in which long-chain acylaminoethyl and alkyl groups are substituted in the 1- and 2-positions, respectively. The method is applicable to solids or to aqueous solutions of the active material. The method is not applicable if anionic surface active agents are present.