2. EN^**) 12766-1 “Petroleum products and used oils - Determination of PCBs and related products - Part1: Separation and determination of selected PCB congeners by gas chromatography (GC) using an electron capture detector (ECD)".
EN^**) 12766-2 “Petroleum products and used oils - Determination of PCBs and related products - Part2: Quantification of PCB content in samples analyzed by GC“.