PL
W pracy przedstawiono wykorzystanie chromatografii na kolumnie z żelem krzemionkowym oraz wysokorozdzielczej chromatografii gazowej (HRGC) do analizy zawartości sumy polichlorowanych bifenyli (PCB) w przepracowanych olejach transformatorowych. Porównano wyniki oznaczeń PCB w próbkach tych samych olejów, uzyskane w dwóch różnych laboratoriach w Polsce i Szwajcarii.
EN
The concentration of total polychlorinated bifenyls (PCBs) in selected transformer oils was determined. The separation of PCBs on silica gel column, after the purification of the sample with concentrated H2SO4, was performed. For identification and determination of PCBs, high resolution gas chromatography (HRGC) on a fused silica capillary column Rtx - 5 (60 m x 0,25 mm x 0,25 µm) with ECD detector, was employed. The mixtures of PCBs (28, 52, 101, 118, 138, 153 , 180) and technical Aroclors 1242, 1254 and 1260 were used as standard solutions. The results of PCBs quantification were compared with the results obtained in a Swiss laboratory. The differences between these results do not exceed 20%.