Pollution analysis, source tracing and risk assessment of nitropolycyclic aromatic hydrocarbons in grilled meat products

This study investigated the concentration, sources, and risk assessment of 10 nitropolycyclic aromatic hydrocarbons (NPAHs) in 6 types of grilled meat products in the daily diet of China. A dispersed solid phase extraction device (dSPE) using multi walled carbon nanotubes/polyaniline (MWCNTs/PANI) adsorbent combined with high–performance liquid chromatography tandem mass spectrometry (HPLC–MS) was used for batch sample analysis. The average recovery rate of the samples is 88.5%–97.8%, with detection limits and quantification limits ranging 0.01–0.45 μg/kg and 0.03–1.48 μg/kg, respectively. The relative standard deviation is 2.1%–4.9%. The total concentration range of ∑10NPAHs is 3.86–36.97 μg/kg, with the total concentration range and detection range of 3 and 4 rings NPAHs being 0.44–24.13 μg/kg, 3.14%–77.55% and 2.17–9.31 μg/kg, 11.25%–92.23%. Characteristic ratio indicates that the pollution source of NPAHs is mainly from single emissions such as motor vehicle emissions and biomass burning. 4-ring NPAHs play an important role in the carcinogenic risk assessment of samples. The incremental lifetime cancer risk study showed that the cancer risk level of grilled meat products is relatively low, with an ILCR risk of 3.55×10 –6 –2.27×10 –5 . The overall risk shows an upward trend with age, higher in females than males and higher in rural areas than in cities. • Establish MWCNTs/PANI dSPE method for the concentration, source, risk of 10 NPAHs. • 4–ring NPAHs play an important role in the carcinogenic risk of samples. • There are significant differences in ILCR among regions, genders, and age groups.