This part of ISO 923311DF 140 specifies a method for the determination in cheese rind of natamycin mass
fraction of above 0,5 mg/kg and surface-area-related natamycin mass of above 0,03 mg/dm2.
NOTE It is possible that the method may be suitable for detecting migration of natamycin into the cheese.
IDF 140-1-2007 history
2007IDF 140-1-2007 Cheese, cheese rind and processed cheese -- Determination of natamycin content -- Part 1: Molecular absorption spectrometric method for cheese rind