Changes to polychlorinated biphenyl (PCB) signatures and enantiomer fractions across different tissue types in Guillemots

MARINE POLLUTION BULLETIN

卷:131

Article

Megson, David^1,2  Brown, Thomas A.^2,3  O'Sullivan, Gwen⁴  Robson, Matthew⁵  Ortiz, Xavier⁵  Worsfold, Paul J.²  Comber, Sean²  Lohan, Maeve C.²  Reiner, Eric J.⁵ 

[1] Manchester Metropolitan Univ, Sch Sci & Environm, Manchester M1 5GD, Lancs, England

[2] Plymouth Univ, Biogeochem Res Ctr, SoGEES, Plymouth PL4 8AA, Devon, England

[3] Scottish Assoc Marine Sci, Marine Ecol & Chem, Oban PA37 1QA, Argyll, Scotland

[4] Mt Royal Univ, Dept Earth & Environm Sci, 4825 Mt Royal Gate SW, Calgary, AB T3E 6K6, Canada

[5] Ontario Minist Environm & Climate Change, 125 Resources Rd, Toronto, ON M9P 3V6, Canada

关键词: Polychlorinated biphenyl (PCBs);    Guillemot (Uria aalge);    North Atlantic;    Tissue;    Comprehensive two-dimensional gas;    chromatography (GCxGC);    Enantiomer fraction;   

DOI  :  10.1016/j.marpolbul.2018.04.014

来源: Elsevier

【 摘 要 】

Two Guillemot carcases were dissected, each providing 12 discrete tissue samples and 3 samples of partially digested food. One hundred and five PCBs from the 209 PCBs determined by GCxGC-ToFMS were detected. The relative proportions of individual PCBs did not vary greatly within tissue types, although the PCB profile from undigested food could be distinguished. Enantiomer fractions (EFs) were determined for CB-95, CB-136 and CB-149 by GC-HRqToFMS. EFs in the partially digested food were near racemic, with high levels of enrichment for El CB-95 in the kidneys and liver (EF of 0.80 and 0.84 respectively). This provides some of the clearest evidence to date that fractionation takes place in the organs where metabolic biotransformation and elimination of PCBs occurs. Our findings also confirm the ability of non-lethal sampling techniques, such as collection of small (< 1 g) blood samples, to provide PCB signatures that are representative of an individual organism.

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