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Gas and particulate phase ambient air concentrations of polycyclic aromatic hydrocarbons (Ʃ16PAHs) were determined in Strasbourg, a large city located in the Alsace region of northeastern France, from May 2018 to March 2020, to study the evolution of their temporal variations and their potential origins. The analysis of PAHs was performed using a global analytical method permitting the quantification of pesticides, PAHs, and polychlorobiphenyls (PCBs). Filters and Carbon doped silicon carbide [email protected] foams were extracted by accelerated solvent extraction (ASE) followed by a solid-phase extraction (SPE). Afterwards, extracts were analyzed using gas chromatography coupled to tandem mass spectrometry (GC-MS/MS). Prior to analysis, a pre-concentration step based on solid-phase microextraction (SPME) was used with a polydimethylsiloxane (PDMS) 100 µm fiber. The average total (gas plus particulate) concentration of Ʃ16PAHs varied from 0.51 to 117.31 ng m−3 with a mean of 16.87 ng m−3, with higher concentrations in the cold season of more than 2.5-fold and 6-fold that in the warm season for the gas and particulate phases, respectively. Moreover, low molecular weight (LMW) (2-ring and 3-ring) and medium molecular weight (MMW) (4-ring) PAHs contribute dominantly to the gas phase, while the particulate phase is associated with MMW (4-ring) and high molecular weight (HMW) (5-ring and 6-ring) PAHs. Gas/particle partitioning coefficient (log Kp) was calculated, and values varied between −4.13 and −1.49. It can be seen that the log Kp increased with the molecular weight of the PAHs and that the log Kp is different between cold and warm seasons for HMW PAHs but not for LMW PAHs. Diagnostic ratios of PAHs, which were employed to estimate the primary source of PAHs in Strasbourg, indicate that fuel combustion and biomass/coal burning are the possible origins of PAHs in Strasbourg’s atmosphere.
Supansa Chimjarn; Olivier Delhomme; Maurice Millet. Temporal Distribution and Gas/Particle Partitioning of Polycyclic Aromatic Hydrocarbons (PAHs) in the Atmosphere of Strasbourg, France. Atmosphere 2021, 12, 337 .
AMA StyleSupansa Chimjarn, Olivier Delhomme, Maurice Millet. Temporal Distribution and Gas/Particle Partitioning of Polycyclic Aromatic Hydrocarbons (PAHs) in the Atmosphere of Strasbourg, France. Atmosphere. 2021; 12 (3):337.
Chicago/Turabian StyleSupansa Chimjarn; Olivier Delhomme; Maurice Millet. 2021. "Temporal Distribution and Gas/Particle Partitioning of Polycyclic Aromatic Hydrocarbons (PAHs) in the Atmosphere of Strasbourg, France." Atmosphere 12, no. 3: 337.
The continuous release of chemicals in the environment is nowadays a main concern due to their harmful effects. In this paper, a new and efficient extraction and analytical method for the assessment of 103 pesticides, 17 polycyclic aromatic hydrocarbons (PAHs) and 22 polychlorinated biphenyl (PCBs), using passive samplers for the assessment of the ambient air pollution in Strasbourg region was proposed. The samplers used were based on XAD®-2 resins and on [email protected] foams. The proposed extraction procedure was based on pressurized solvent extraction (PSE) followed by a solid-phase extraction (SPE) prior to chromatographic analysis. Afterwards, extracts were analyzed using liquid and gas chromatography coupled to tandem mass spectrometer. However, prior to the gas chromatography (GC) analysis a pre-concentration / pre-injection step based on solid-phase microextraction (SPME) was used. Moreover, the developed method was tested for the extraction solvent used, the extraction time needed for each step as well as the cartridge type required for SPE and the fiber type used for SPME. Subsequently, the method was validated for its linearity proved for a determination coefficient (R2) higher than 0.98 for the majority of the assessed compounds, accuracy and precision. These two parameters were validated by the low relative standard deviation obtained for repeatability and reproducibility, the low limits of detection and quantification respectively ranged between 0.01 and 153.2 ng. sampler−1 and 0.03 and 459.2 ng. sampler−1 as well as the high recoveries ranged between 76% and 99% for all assessed compounds.
Marine Levy; Josephine AL ALAM; Olivier Delhomme; Maurice Millet. An integrated extraction method coupling pressurized solvent extraction, solid phase extraction and solid-phase micro extraction for the quantification of selected organic pollutants in air by gas and liquid chromatography coupled to tandem mass spectrometry. Microchemical Journal 2020, 157, 104889 .
AMA StyleMarine Levy, Josephine AL ALAM, Olivier Delhomme, Maurice Millet. An integrated extraction method coupling pressurized solvent extraction, solid phase extraction and solid-phase micro extraction for the quantification of selected organic pollutants in air by gas and liquid chromatography coupled to tandem mass spectrometry. Microchemical Journal. 2020; 157 ():104889.
Chicago/Turabian StyleMarine Levy; Josephine AL ALAM; Olivier Delhomme; Maurice Millet. 2020. "An integrated extraction method coupling pressurized solvent extraction, solid phase extraction and solid-phase micro extraction for the quantification of selected organic pollutants in air by gas and liquid chromatography coupled to tandem mass spectrometry." Microchemical Journal 157, no. : 104889.