Particle Size Distribution of Oil-mist Emitted from Fish Grilling and Concentrations of Polycyclic Aromatic Hydrocarbons

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Nineteen polycyclic aromatic hydrocarbons (PAHs) containing 2 to 7-rings were determined in oil mist emitted during fish grilling. The oil mist was collected depending on the particles size, and the concentration of each PAH was measured by GC/MS. PAHs having 4 to 6 rings were dominantly detected in particle size ranges below a diameter of 3.3 μm, whereas PAHs with 2 to 4-rings accounted for over 90 % of total PAHs in ranges over 3.3 μm diameter. In addition, PAHs having 2 and 3 rings showed a bimodal size distribution with peak tops at diameters of 1.1 to 2.1 μm and over 11 μm. On the contrary, PAHs with 5 and 6 rings demonstrated a unimodal size distribution with the peak top at diameters of 1.1 to 2.1 μm. Then, the total concentrations of PAHs were converted into a toxic equivalent (TEQ) of benzo[a]pyrene, depending on the particle size ranges. The obtained size distribution of TEQ was unimodal, having the peak top at diameters of 1.1 to 2.1 μm. TEQ at diameters over 4.7 μm, 1.1 to 4.7 μm and below 1.1 μm corresponds to 8 %, 47 % and 45 % of total TEQ, respectively. This suggest the possibility that around half of the TEQ converted PAHs can reach the pulmonary alveolus region when PAHs containing oil-mists are emitted from fish grilling and inhaled through the respiratory tract.