Equilibrium sampling of environmental pollutants in fish: comparison with lipid-normalized concentrations and homogenization effects on chemical activity

Environmental Toxicology and Chemistry
Annika JahnkeMichael S McLachlan

Abstract

Equilibrium sampling of organic pollutants into the silicone polydimethylsiloxane (PDMS) has recently been applied in biological tissues including fish. Pollutant concentrations in PDMS can then be multiplied with lipid/PDMS distribution coefficients (D(Lipid,PDMS) ) to obtain concentrations in fish lipids. In the present study, PDMS thin films were used for equilibrium sampling of polychlorinated biphenyls (PCBs) in intact tissue of two eels and one salmon. A classical exhaustive extraction technique to determine lipid-normalized PCB concentrations, which assigns the body burden of the chemical to the lipid fraction of the fish, was additionally applied. Lipid-based PCB concentrations obtained by equilibrium sampling were 85 to 106% (Norwegian Atlantic salmon), 108 to 128% (Baltic Sea eel), and 51 to 83% (Finnish lake eel) of those determined using total extraction. This supports the validity of the equilibrium sampling technique, while at the same time confirming that the fugacity capacity of these lipid-rich tissues for PCBs was dominated by the lipid fraction. Equilibrium sampling was also applied to homogenates of the same fish tissues. The PCB concentrations in the PDMS were 1.2 to 2.0 times higher in the homogenates (sta...Continue Reading

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Citations

Jun 14, 2013·Environmental Science & Technology·Ling JinBeate I Escher
Sep 12, 2013·Environmental Science & Technology·Ian John AllanAdam David Lillicrap
Jan 19, 2016·The Science of the Total Environment·Werner BrackMartin Krauss
Dec 1, 2015·Environmental Science & Technology·Kees BooijPaul Whitehouse
May 31, 2013·Environmental Toxicology and Chemistry·L S McCartyD Mackay
Apr 30, 2015·Environmental Science & Technology·Ling JinBeate I Escher
Dec 20, 2016·Environmental Toxicology and Chemistry·James M ArmitageJohn W Nichols
Jan 23, 2014·Environmental Science. Processes & Impacts·Annika JahnkeMatthew MacLeod
May 26, 2016·Environmental Science. Processes & Impacts·Sobek AnnaBreitholtz Magnus
Oct 7, 2016·Environmental Science. Processes & Impacts·Damien Johann BoliniusAnnika Jahnke
Jan 4, 2020·Archives of Environmental Contamination and Toxicology·Djohan DjohanD W Connell

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