Prediction of Concentrations of 2,3,7,8-Tetrachlorodibenzo-p-dioxin Equivalents from Total Concentrations of Polychlorinated Biphenyls in Fish Fillets

PCB concentrations in walleyes and their prey from the Saginaw River, Lake Huron: A comparison between 1990 and 2007

“…Concentrations of PCBs measured in fish from Saginaw Bay were greater than those reported for other locations in the Great Lakes (Williams et al, 1992). The mean concentration in composited, very large walleyes (608 mm) collected during 2007 was 1900 ng PCBs/g ww, which is less than the current concentration of 2000 ng PCBs/g ww that is required to trigger a fish consumption advisory (Foran and Vander Ploeg, 1989;Sonzogni and Swain, 1984;MDPH, 1993).…”

Contribution of PCB exposure from fish consumption to total dioxin-like dietary exposure

“…However, in places where such data are available, like the Willamette River and Columbia River Basin, PCB TEQ risk calculations are much higher than those based on Aroclor risk largely due to the presence of and dioxinlike toxicity of PCB 126 (EVS, 2000;USEPA, 2002). The greater risk projections resulting from congener versus total PCB based risk assessments have previously been explored by Williams et al (1992). So if more PCB congener data become available for regional bodies of water, there may be more and more restrictive PCB based fish advisories.…”

“…However because exposure to dioxinlike PCBs raises risk concerns at lower levels than for total PCB or Aroclor exposure (the only currently accepted risk assessment methods to address the toxicity of non-dioxin-like PCBs) (Williams et al, 1992;EVS, 2000;USEPA, 2002;Judd et al, 2003b), this study focuses on the consequences of this emphasis on PCB TEQ exposure from fish and seafood in the context of other TEQ exposure.…”

Characterization studies of a semi‐automated separation method for analysis ofnon‐orthosubstituted polychlorinated biphenyl (PCB) congeners in environmental samples

“…Although many HRGC columns have been tried, no single column can adequately separate all of the environmentally relevant non-ortho substituted congeners from their PCB interferences 12 . Part of the problem is that the non-ortho substituted congeners may be present in environmental samples at concentrations 100 times less than those of the interfering congeners.…”