ISO 16560:2015规定了测定R-(O-C2H4)nOH类型的芳族和脂族非离子表面活性剂中聚乙二醇(PEG)含量的方法；其中n是平均环氧乙烷(EO)值。适用于所有溶于甲醇或甲醇/水混合物的乙氧基化产物。该方法适用于质量分数大于或等于0.1%的PEG浓度。本国际标准不适用于摩尔质量低于400g/mol的PEG。未检测到单体乙二醇、二乙二醇、三乙二醇和甘油。

ISO 16560:2015 specifies a method for the determination of the polyethylene glycol (PEG) content in aromatic and aliphatic non-ionic surface active agents of the type R-(O-C₂H₄) _n OH; where n is the mean ethylene oxide (EO) value. It is applicable to all ethoxylated products soluble in methanol or methanol/water mixture. This method applies to PEG concentrations as mass fraction greater than or equal to 0,1 %. This International Standard is not applicable to PEG whose molar mass is lower than 400 g/mol. Monomeric ethylene glycol, diethylene glycol, triethylene glycol, and glycerol are not detected.