UNE EN ISO 20122:2024
Vegetable oils - Determination of mineral oil saturated hydrocarbons (MOSH) and mineral oil aromatic hydrocarbons (MOAH) with online-coupled high performance liquid chromatography-gas chromatography-flame ionization detection (HPLC-GC-FID) analysis - Method for low limit of quantification (ISO 20122:2024, Corrected version 2024-11)
Aceites vegetales. Determinación de hidrocarburos saturados de aceites minerales (MOSH) y de hidrocarburos aromáticos de aceites minerales (MOAH) mediante cromatografía líquida de alta resolución y cromatografía de gases acopladas a un detector de ionización de llama (HPLC-GC-FID) en línea. Método para límites de cuantificación bajos. (ISO 20122:2024, Versión corregida 2024-11).
| Standard number: | UNE EN ISO 20122:2024 |
| Pages: | 51 |
| Released: | 2024-12-04 |
| Status: | Standard |
| Pages (Spanish): | 56 |
UNE EN ISO 20122:2024
This International standard method specifies a procedure for the determination of saturated and aromatic 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 mineral oil aromatic hydrocarbons (MOAH). According to the results of the interlaboratory studies, the method has been proven suitable for MOSH mass 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 by examination by GC/*GC-MS. An alternative method for the epoxidation of the MOAH fraction (performic acid epoxidation) is proposed in Annex C. This alternative method provides comparable results to the ethanolic epoxidation of the MOAH fraction described in 8.5. This alternative method for epoxidation has proven to be efficient for samples with a high amount of interferences in the MOAH fraction (e.g. tropical oils)[13].