UNE-EN ISO 20122:2024

This International standard method specifies a procedure for the determination of saturated andaromatic hydrocarbons (from C10 to C50) in vegetable fats and oils using the online-coupled HPLC-GCFID([1],[2] and[3]). This standard is not intended to be applied to other matrices.The method is applicable for the analysis of mineral oil saturated hydrocarbons (MOSH) and/or mineraloil aromatic hydrocarbons (MOAH).According to the results of the interlaboratory studies, the method has been proven suitable for MOSHmass concentrations above 3 mg/kg and MOAH mass concentrations above 2 mg/kg.In case of suspected interferences, the fossil origin of the MOSH and MOAH fraction can be verified byexamination by GC/*GC-MS.An alternative method for the epoxidation of the MOAH fraction (performic acid epoxidation) isproposed in Annex C. This alternative method provides comparable results to the ethanolic epoxidationof the MOAH fraction described in 8.5. This alternative method for epoxidation has proven to be efficientfor samples with a high amount of interferences in the MOAH fraction (e.g. tropical oils)[13].