GB/T 11989-2008.Anionic surface active agents-Determination of soluble matter content in light petro...
GB/T 11989-2020 表面活性剂工业烷基芳基磺酸钠(不包括苯衍生物)试验方法
GB/T 11989-2020.Surface active agents-Test methods of technical sodium alkylarylsulphonates (excludi...