ISO 20122:2024 植物油 用在线耦合高性能液相色谱-气相色谱-火焰离子化检测（HPLC-GC-FID）分析法测定矿物油饱和烃（MOSH）和矿物油芳香烃（MOAH） 定量下限法

标准编号：ISO 20122:2024

中文名称：植物油 用在线耦合高性能液相色谱-气相色谱-火焰离子化检测（HPLC-GC-FID）分析法测定矿物油饱和烃（MOSH）和矿物油芳香烃（MOAH） 定量下限法

英文名称：Vegetable oils — Determination of mineral oil saturated hydrocarbons (MOSH) and mineral oil aromatic hydrocarbons (MOAH) with online-coupled high performance liquid chromatography-gas chromatography-f

发布日期：2024-04

标准范围

本文件规定了使用在线耦合高效液相色谱-气相色谱-火焰离子化检测（HPLC-GC-FID）测定植物脂肪和油中饱和烃和芳香烃（C10至C50）的程序。？本文档不适用于其他矩阵。该方法适用于矿物油饱和烃（MOSH）和/或矿物油芳香烃（MOAH）的分析。根据实验室间研究的结果，该方法已被证明适用于MOSH质量浓度高于3？mg/kg和MOAH质量浓度高于2？毫克/千克。在怀疑干扰的情况下，可以通过GC检查来验证MOSH和MOAH组分的化石来源？GC-MS。附录C中提出了MOAH馏分环氧化的替代方法（过甲酸环氧化）。该替代方法提供了与8.6中描述的MOAH级分的乙醇环氧化相当的结果。这种用于环氧化的替代方法已被证明对于MOAH级分中具有大量干扰的样品（例如热带油）是有效的。

This document specifies a procedure for the determination of saturated and aromatic hydrocarbons (from C10 to C50) in vegetable fats and oils using the online-coupled high performance liquid chromatography-gas chromatography-flame ionization detection (HPLC-GC-FID). This document does not apply 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 8.6. 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).

标准预览图