In this work, the content of polycyclic aromatic hydrocarbons (PAHs) in total suspended particles and particulate matter with an aerodynamic diameter ≤ 2.5 µm (PM2.5) was analyzed using gas chromatography-mass spectrometry. In addition, a sequential chemical analysis of C-rich particles was performed through the parallel coupling of micro-Raman spectroscopy and scanning electron microscopy with X-ray scattering detection. Samples were collected at four sites in the Monterrey metropolitan area, Mexico. A total of 13 PAHs were quantified; indeno(1,2,3-cd)pyrene, chrysene, and benzo(a)anthracene were the most abundant. The total PAH concentrations at the four sampling sites ranged from 1.34 to 8.76 μg/m3. The diagnostic relation of the PAHs indicates that these compounds were emitted by the burning of gasoline and diesel and by the burning of charcoal and biomass. The sequential analysis correlated the morphology and the elemental/molecular composition of the C-rich particles, associated with the PAHs, with their possible emission sources. The estimated lifetime excess cancer risk for inhalation was higher than that established by the World Health Organization, which clearly makes this a potential health risk for the population.

中文翻译：

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蒙特雷都会区与PM2.5和TSP相关的PAH的环境水平，来源和癌症风险评估。

在这项工作中，使用气相色谱-质谱法分析了空气动力学直径≤2.5 µm（PM2.5）的总悬浮颗粒和颗粒物中多环芳烃（PAHs）的含量。此外，通过微拉曼光谱和扫描电子显微镜与X射线散射检测的平行耦合对富C颗粒进行了顺序化学分析。在墨西哥蒙特雷市区的四个地点收集了样本。总共定量了13种PAH。茚并（1,2,3-cd）,、和苯并（a）蒽最丰富。四个采样点的总PAH浓度范围为1.34至8.76μg/ m3。多环芳烃的诊断关系表明，这些化合物是通过汽油和柴油的燃烧以及木炭和生物质的燃烧而排放的。顺序分析将与PAHs相关的富含C的颗粒的形态和元素/分子组成与其可能的排放源相关联。估计一生中吸入过量癌症的风险高于世界卫生组织确定的风险，这显然使这成为人群的潜在健康风险。