Determination on PCDD/Fs and Dioxin-like PCBs simultaneously in fish by isotope dilution HRGC/HRMS

  Objective   Seventeen PCDD/Fs and twelve dioxin-like PCBs in fish were determined by HR GC/HRMS.

  Methods   According to EPA1663 and EPA1668A, PCDD/Fs and PCBs were extracted from fish by Soxhlet extraction, cleaned up by FMS and quantified by HR GC/HRMS-M ID, using isotope dilution metholdogy.

  Results   The congeners of PCDD/Fs and PCBs can be separated well by this method. The recovery of PCDD/Fs was 83.83%-98.48%.The recovery of PCBs was 50.06%-90.56%.Thirteen congeners of PCDD/Fs and twelve congeners of PCBs can be detected in the fish. Total Toxicity Equivalency Quantity(TEQ)of PCDD/Fs in the fish was 0186 pg/g, TEQ of PCBs in the fish was 2177 pg/g.

  Conclusion   Seventeen congeners of PCDD/Fs and tweleve congeners of PCBs can be measured simultaneously in the same sample, the method was efficient and the results were accurate and reliable.