Selective supercritical fluid extraction to identify aged sediment-bound PCBs available for uptake by eel

Research output: Contribution to journalArticle


A naturally contaminated sediment was partially extracted with selective supercritical fluid extraction (SFE) to remove a fraction of supposedly bioavailable PCBs from the matrix. Eels (Anguilla anguilla) were cultured in systems with untreated and pre-extracted sediment, respectively, and it was shown that the SFE treatment selectively removed bioavailable PCBs from the sediment, since relative biota-to-sediment accumulation factors (BSAFs) for the eight studied PCB congeners were much lower in the pre-extracted than in the untreated system at the end of the study. Relative BSAF values decreased with about the same relative amount for all eight congeners, independent of the degree of chlorination and the initial concentration in the sediment. The results demonstrate the ability of SFE to selectively remove sediment-bound PCBs that are available for uptake by the eels, thus demonstrating the feasibility of using selective SFE to estimate bioavailability of PCBs in sediments.

Supercritical fluid extraction could successfully measure bioavailable fractions of PCBs in sediment.


  • Tobias Nilsson
  • J Häkkinen
  • Per Larsson
  • Erland Björklund
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Analytical Chemistry
  • Ecology
Original languageEnglish
Pages (from-to)87-94
JournalEnvironmental Pollution
Issue number1
Publication statusPublished - 2006
Publication categoryResearch

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Ecology/Ecotoxicology (Closed 2011) (011006020), Analytical Chemistry (S/LTH) (011001004)