Smoke-dried bonito is a traditional
Japanese processed fish product
containing considerable amounts of polycyclic aromatic hydrocarbons
(PAHs). Their concentrations generally exceed the maximum levels under
EU regulations. Although halogenated PAHs (XPAHs) have attracted attention
owing to their high toxicities, no information on the occurrence of
XPAHs in smoke-dried bonito is available. In this study, we investigated
the occurrence of PAHs and XPAHs in smoke-dried bonito purchased in
the Japanese market in 2020 and evaluated the contamination levels
in terms of concentrations and incremental lifetime cancer risks (ILCRs).
The total concentrations of PAHs were 419–1070 μg kg–1 and those of XPAHs were 0.306–1.01 μg
kg–1. Because smoke-dried bonito is consumed in
low amounts, the ILCR of PAH4 via dietary consumption of smoke-dried
bonito was the lowest among those of other smoked foods. Smoking by
hot-plate heating of wood chips should be one of the effective countermeasures
to reduce PAH contamination.
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