DIN EN ISO 9233-2-2018 干酪、干酪外皮和加工的干酪. 游酶素含量的测定. 第2部分: 干酪、干酪外皮和加工的干酪用高效液相色谱法 (ISO 9233-2-2018); 德文版本 EN ISO 9233-2-2018
Cheese, cheese rind and processed cheese - Determination of natamycin content - Part 2: High-performance liquid chromatographic method for cheese, cheese rind and processed cheese (ISO 9233-2:2018); German version EN ISO 9233-2:2018
ISO 9233-2 IDF 140-2 specifies a method for the determination of natamycin mass fraction in cheese, cheese rind and processed cheese of above 0,5 mg/kg and of the surface-area-related natamycin mass in cheese rind of above 0,03 mg/dm2.