Determination of PCBs in selected components of a food chain by means of SPE and GC-MS

The goal of this work was the isolation of PCBs from different environmental matrices by means of solid-phase (SPE) extraction and gas chromatography/mass spectrometry (GC/MS). The analyses include the determination of PCBs in fourteen samples of transformer oils and different kinds of fodders (for poul­try, pigs, and cattle). The recovery rates for different congeners were on the level of 75-85%. The detec­tion limits of five congeners of PCBs were in the range 85 to 130 ug/kg. The RSD was on the level of 2.7 - 4.4%. The Ishikawa diagram was used for evaluation of uncertainty.