Determination of PCBs in Fish Oil by GC/MS

Fish oil sample is passed through GPC and SPE(Florisil)to be purified, and then determined by subsection SIM of GC/MS as quantitative analysis and qualitative analysis method. The results show that detection limit in the SIM mode is 10~100 fg. This method can determine 31 chromatogram peaks of PCBs qualitatively and 7 chromatogram peaks of PCBs quantitatively, which can be used to indicate how the marine has been contaminated.