Size distribution of toxicants in airborne particulates remains insufficiently investigated in Algeria. A 1-year campaign was performed at Bab Ezzouar, Algiers (Algeria), aimed at characterizing particulates for their physical and chemical features. For this purpose, scanning electronic microscopy (SEM), Raman spectroscopy (RaS), and GC-MS methodologies were applied. The samples were collected on daily basis by means of a high-volume sampling (HVS) system equipped with cascade impactor separating three size fractions, i.e., particles with aerodynamic diameters d < 1.0 μm (PM₁), 1.0 μm <d<2.5 μm (PM_2.5), and 2.5 μm <d<10 μm (PM₁₀), respectively. The organic fraction was recovered from substrate through solvent extraction in an ultrasonic bath, separated and purified by column chromatography, then analyzed by gas chromatography coupled with mass spectrometry (GC-MS). Investigation was focused on polycyclic aromatic hydrocarbons (PAHs) and the concentration ratios suitable to investigate the source nature. Further information was drawn from SEM and Raman analyses. Total PAH concentrations ranged broadly throughout the study period (namely, from 4.1 to 59.7 ng m^-3 for PM₁, from 2.72 to 32.3 ng m^-3 for PM_2.5 and from 3.30 to 32.7 ng m^-3 for PM₁₀). Both approaches and principal component analysis (PCA) of data revealed that emission from vehicles was the most important PAH source, while tobacco smoke provided an additional contribution.

在阿尔及利亚，空气悬浮颗粒物中毒物的尺寸分布仍未得到充分研究。在阿尔及尔（阿尔及利亚）的 Bab Ezzouar 开展了一项为期 1 年的活动，旨在表征颗粒物的物理和化学特征。为此，应用了扫描电子显微镜 (SEM)、拉曼光谱 (RaS) 和 GC-MS 方法。通过配备级联冲击器的大容量采样 (HVS) 系统每天收集样品，分离三个尺寸部分，即空气动力学直径d < 1.0 μm (PM ₁ )、1.0 μm < d <2.5 μm的颗粒(PM _2.5 ) 和 2.5 μm <d <10 μm (PM ₁₀）， 分别。在超声波浴中通过溶剂萃取从底物中回收有机部分，通过柱色谱分离和纯化，然后通过气相色谱结合质谱（GC-MS）进行分析。调查的重点是多环芳烃 (PAH) 和适合调查来源性质的浓度比。进一步的信息来自 SEM 和拉曼分析。在整个研究期间，总 PAH 浓度范围广泛（即PM _{1为 4.1 至 59.7 ng m} ^-3，PM _2.5为2.72 至 32.3 ng m ^-3以及 PM ₁₀为3.30 至 32.7 ng m ^-3）。数据的方法和主成分分析 (PCA) 都表明，车辆排放是最重要的 PAH 来源，而烟草烟雾提供了额外的贡献。