<abstract xmlns="http://www.w3.org/1999/xhtml">

<sec>
<h3>Introduction</h3>
<p>Concentrations of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (DL-PCBs) were investigated in six species of bivalve mollusc purchased on the Polish retail market. The risk to consumers was calculated as a percentage of the tolerable weekly intake (TWI) (2 pg World Health Organization toxic equivalent (WHO-TEQ) kg<sup>−1</sup> body weight (b.w.)).</p>
</sec>
<sec>
<h3>Material and Methods</h3>
<p>Altogether 32 samples were analysed using an isotope dilution technique with high resolution gas chromatography coupled with high resolution mass spectrometry.</p>
</sec>
<sec>
<h3>Results</h3>
<p>Low levels of all analysed compounds were found. The range of PCDD/Fs was 0.08–0.37 pg WHO-TEQ g<sup>−1</sup> of wet weight (w.w.) and 0.04–0.41 pg WHO-TEQ g<sup>−1</sup> w.w. for DL-PCBs. The highest concentrations of all analysed compounds were found in Pacific oysters, at 0.30 pg WHO-TEQ g<sup>−1</sup> w.w. for the sum of PCDD/Fs and 0.19 pg WHO-TEQ g<sup>−1</sup> for the sum of DL-PCBs. These concentrations were 2–4 times higher than those detected in the other analysed mollusc species. Different species-dependent congener profiles were observed for PCDD/F concentrations, while PCB congener concentration profiles were species independent. The risk to consumers was assessed relating theoretical intakes of PCDD/Fs and DL-PCBs per 25, 50 and 100 g of consumption of molluscs per week to the TWI.</p>
</sec>
<sec>
<h3>Conclusion</h3>
<p>Taking into account the low consumption of molluscs in Poland and low concentrations of analysed compounds, neither adults nor children are likely to exceed the TWI by ingestion of food in this category.</p>
</sec>
</abstract>

Introduction
Concentrations of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (DL-PCBs) were investigated in six species of bivalve mollusc purchased on the Polish retail market. The risk to consumers was calculated as a percentage of the tolerable weekly intake (TWI) (2 pg World Health Organization toxic equivalent (WHO-TEQ) kg−1 body weight (b.w.)).


Material and Methods
Altogether 32 samples were analysed using an isotope dilution technique with high resolution gas chromatography coupled with high resolution mass spectrometry.


Results
Low levels of all analysed compounds were found. The range of PCDD/Fs was 0.08–0.37 pg WHO-TEQ g−1 of wet weight (w.w.) and 0.04–0.41 pg WHO-TEQ g−1 w.w. for DL-PCBs. The highest concentrations of all analysed compounds were found in Pacific oysters, at 0.30 pg WHO-TEQ g−1 w.w. for the sum of PCDD/Fs and 0.19 pg WHO-TEQ g−1 for the sum of DL-PCBs. These concentrations were 2–4 times higher than those detected in the other analysed mollusc species. Different species-dependent congener profiles were observed for PCDD/F concentrations, while PCB congener concentration profiles were species independent. The risk to consumers was assessed relating theoretical intakes of PCDD/Fs and DL-PCBs per 25, 50 and 100 g of consumption of molluscs per week to the TWI.


Conclusion
Taking into account the low consumption of molluscs in Poland and low concentrations of analysed compounds, neither adults nor children are likely to exceed the TWI by ingestion of food in this category.

Polychlorinated dibenzo-p-dioxins, dibenzofurans and dioxin-like polychlorinated biphenyls in bivalve molluscs. Risk to Polish consumers?

Journal of Veterinary Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Introduction
Concentrations of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls...

Species	PCDD/Fs	pg WHO-TEQ g⁻¹ w.w. DL-PCBs	PCDD/Fs/DL-PCBs
Dog cockle	0.09 ± 0.01	0.05 ± 0.01	0.13 ± 0.01
Dog cockle	0.08–0.10	0.04–0.06	0.13–0.16
Manila clam	0.10 ± 0.01	0.06 ± 0.02	0.16 ± 0.02
Manila clam	0.09–0.10	0.05–0.09	0.14–0.19
Atlantic jackknife clam	0.12 ± 0.02	0.11 ± 0.01	0.23 ± 0.02
Atlantic jackknife clam	0.10–0.15	0.10–0.12	0.21–0.26
Blue mussel	0.15 ± 0.08	0.14 ± 0.12	0.29 ± 0.20
Blue mussel	0.09–0.33	0.05–0.41	0.13–0.74
Pacific oyster	0.30 ± 0.07	0.19 ± 0.03	0.49 ± 0.08
Pacific oyster	0.23–0.37	0.16–0.21	0.44–0.58
Common cockle	0.12 ± 0.04	0.11 ± 0.08	0.22 ± 0.07
Common cockle	0.09–0.14	0.08–0.13	0.17–0.27
Maximum levels (under Regulation 1259/2011/EU)	3.50	-	6.50

Polychlorinated dibenzo-p-dioxins, dibenzofurans and dioxin-like polychlorinated biphenyls in bivalve molluscs. Risk to Polish consumers?

Pubblicato online: 16 giu 2023

Pagine: 267 - 273

Ricevuto: 06 ott 2022

Accettato: 20 mar 2023

DOI: https://doi.org/10.2478/jvetres-2023-0020

Parole chiave
dioxins, PCBs, bivalve molluscs, risk

© 2023 Szczepan Mikołajczyk et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1.

Fig. 2.

Concentrations of PCDD/Fs and DL-PCBs (x ± SD and range) in bivalve molluscs

Polychlorinated dibenzo-p-dioxins, dibenzofurans and dioxin-like polychlorinated biphenyls in bivalve molluscs. Risk to Polish consumers?

Pubblicato online: 16 giu 2023

Pagine: 267 - 273

Ricevuto: 06 ott 2022

Accettato: 20 mar 2023

DOI: https://doi.org/10.2478/jvetres-2023-0020

Parole chiavedioxins, PCBs, bivalve molluscs, risk

© 2023 Szczepan Mikołajczyk et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1.

Fig. 2.

Concentrations of PCDD/Fs and DL-PCBs (x ± SD and range) in bivalve molluscs

Parole chiave
dioxins, PCBs, bivalve molluscs, risk