本欧洲标准规定了用于测定原料和配制产品中季铵表面活性剂含量的方法，定义为每毫升产品以毫摩尔表示的季铵表面活性剂的量。 注1:在各种情况下，应检查与测试产品不同的产品的适用性。 注2与通常的实验室两相滴定与视觉终点测定（参见ISO 2871-1和ISO 2871-2）相比，电位滴定提供了自动化的优势，因此识别等效点的操作者相关差异可忽略不计，非关键溶剂代替毒理学关键的氯仿

This European Standard specifies a method for the determination of the content of quaternary ammonium surface active agents in raw materials and formulated products, defined as being the amount of quaternary ammonium surface active agents expressed in millimoles per 100 g of product. NOTE 1 The applicability in products different than those tested should be checked in each particular case. NOTE 2 In comparison to usual laboratory two-phase titration with visual endpoint determination (see ISO 2871-1 and ISO 2871-2) potentiometric titration offers the advantage of automation, operator-dependent differences in recognising the equivalence point can be neglected, and a non-critical solvent replaces the toxicologically critical chloroform.