Compositional profiles, persistency and toxicity of polychlorinated naphthalene (PCN) congeners in edible cod liver products from 1972 to 2017

Jerzy Falandysz , Alwyn Fernandes


Edible cod liver products including cod liver oil and canned cod liver, sampled over the lastfive decadesfrom the North Atlantic region, including the Baltic Sea were analysed for a set of persistent and toxi-cologically significant polychlorinated naphthalene (PCN) congeners with some of the highest relativepotencies (dioxin-like toxicity) among PCNs. The targeted congeners showed a near-universality ofoccurrence in all samples apart from the most recent sample of cod liver oil which was assumed to behighly purified, as cod livers from the same period and location showed appreciable amounts of PCNs.The majority of dominant congeners in legacy technical PCN mixtures were absent or occurred in lowconcentrations, raising the possibility that congeners arising from combustion related sources may beacquiring a greater significance following the decline and elimination of PCN production. The apparentappreciation in the relative amounts of PCN#70 in the last three to four decades may provide support forthis view. The PCN contribution to dioxin-like toxic equivalence (TEQ) that was estimated for thesesamples (range 1.2e15.9 pg TEQ g-1) was significant in comparison to the EU regulated value of 1.75 pgTEQ g-1 for dioxins infish oils. Most of the TEQ was associated with PCNs 66/67, 64/68, 69 and 73.Although metabolic processes are likely to influence this distribution, the profile is a little different tothat observed in the tissues of higher order animals where PCNs #66/67 and #73 may contributeapproximately 90% to the summed TEQ.
Author Jerzy Falandysz (FCh/DEChR/LEChE)
Jerzy Falandysz,,
- Laboratory of Environmental Chemistry and Ecotoxicology
, Alwyn Fernandes
Alwyn Fernandes,,
Journal seriesEnvironmental Pollution, ISSN 0269-7491, e-ISSN 1873-6424, (N/A 100 pkt)
Issue year2020
Publication size in sheets0.50
Article number114035
Keywords in EnglishDioxin-like toxicity, persistence, fish oil, marine food, toxic equivalence
ASJC Classification2700 General Medicine; 3005 Toxicology; 2307 Health, Toxicology and Mutagenesis; 2310 Pollution
Languageen angielski
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 17-07-2020, ArticleFromJournal
Publication indicators WoS Citations = 3.000; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.578; WoS Impact Factor: 2018 = 5.714 (2) - 2018=6.152 (5)
Citation count*3 (2020-08-08)
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