| Abstract Title: | Dioxin, PCB, PBDE and PFAA concentrations in Baltic salmon during the 2000's |
| Abstract Type: | Poster |
| Session Choice: | Food/Drink |
| Presenter Name: | Dr Jani Koponen |
| Co-authors: | Dr Paivi Ruokojarvi Prof Hannu Kiviranta Dr Jaakko Mannio Dr Pekka Vuorinen Dr Marika Jestoi |
| Company/Organisation: | National Institute for Health and Welfare (THL) |
| Country: | Finland |
Abstract Information :
In the past monitoring programs, the levels of polychlorinated dibenzo-p-dioxins and furans
(PCDD/Fs) and polychlorinated biphenyls (PCBs) in the big Baltic herring (Clupea harengus
membras) and salmon (Salmo salar) have exceeded the established maximum levels set by the
European Commission for food. The present project was launched in 2016 to gain up to date
information on the levels of PCDD/Fs, PCBs, polybrominated diphenylethers (PBDEs) and
perfluoro alkyl acids (PFAAs) in Baltic fish. This paper reports the results of the environmental
contaminants of Baltic salmon species sampled from different locations in the Baltic Sea area.
PCDD/Fs, PCBs, PBDEs and PFAAs were analysed from pooled, freeze-dried fish samples
according to an accredited method (T077, accreditation by FINAS according to EN ISO/IEC
17025). Both the isotope dilution/GC-HRMS (Peltonen H. et al., Chemosphere, 2014) and LCESI-
MS/MS (Koponen et al., J Chrom A, 2013) were applied for the instrumental analysis.
According to our results, six out of eight salmon samples exceeded the EU maximum level for
PCDD/Fs (3.5 pg TEQ/g fw) and all samples exceeded the maximum level for the sum of
PCDD/Fs and PCBs (6.5 pg TEQ/g fw). The non-dioxin-like PCBs (indicator-PCBs), did not
exceed the EU maximum level (75 ng/g fw). The PCDD/F and PCB concentrations in Baltic
salmon decreased considerably from the levels of 2002 and 2009 (Figure 1). The decrease in
PCDD/Fs and PCBs in salmon varied between different sampling locations from 54% and 57%
from 2002 to 2016 and between 0% and 39% from 2009 to 2016. The overall decrease in the
total TEQ concentration from all sampling sites was 58% during 2002 -2016, and 21% during
2009 -2016.
The levels of PBDEs slightly decreased, whereas a slight increase in the concentration of
perfluoro-octane sulfonate (PFOS, the main PFAA homologue) was observed between 2009 and
2016. The PBDEs including BDE-209 and PFAAs were not analyzed in 2002 samples. So far, no
maximum levels have been set for PBDEs or PFAAs in food by EU.
