TY - JOUR ID - 151615 TI - Heat-Refluxextraction (HRE) and GC/MS Analysis of Polycyclic Aromatic Hydrocarbons and Their Nitrted Derivatives Adsorbed on Diesel Combustion Engine Prticles JO - Physical Chemistry Research JA - PCR LA - en SN - 2322-5521 AU - Oukebdne, Khalil AD - Laboratory of Separation and Purification Technologies, Department of Chemistry - Faculty of Sciences, P. O. Box: 119, University of Tlemcen, Algeria Y1 - 2023 PY - 2023 VL - 11 IS - 2 SP - 203 EP - 219 KW - PAHs KW - Diesel exhaust particles KW - Nitro-PAHs KW - Soot KW - Alkanes DO - 10.22036/pcr.2022.338281.2081 N2 - This study aims at the identification and quantitative determination of polycyclic aromatic hydrocarbons (PAHs) adsorbed on soot particles emitted by diesel engines, but also of their nitro derivatives "nitro-PAHs". The challenge is double: develop a Heat-reflux extraction (HRE) technique to selectively and quantitatively extract the targeted pollutants adsorbed on soot, and to analyze them at trace amounts. Extraction results using dichloromethane showed a modest improvement in the extraction of volatile PAHs (more than 80%) and heavy PAHs (10 to 20%). Among the other solvents tested, pyridine proved to be the best extractant, with 50% extraction of the heaviest PAHs. Combined with diethylamine, the extraction efficiency of heavy PAHs reached 90%, which proves the ability of the pyridine-diethylamine mixture to extract quantitatively all PAHs, alkanes and nitro-PAHs. Moreover, pyridine associated with 1% acetic acid allowed the quantitative extraction of heavy nitro-PAHs, which were only partially desorbed with previous solvents. In comparison, when extracting real soot directly from a diesel engine test bench, very high amounts of linear alkanes from C14 to C32 were obtained, but few PAHs : naphthalene, biphenyl, phenanthrene, anthracene and fluorine (0.31-4.84 µg.g-1) and nitrated derivatives: 1-nitronaphtalene, 2-nitrofluorene and 1-nitropyrene (0.97-1.78 µg.g-1). UR - https://www.physchemres.org/article_151615.html L1 - https://www.physchemres.org/article_151615_0bbf4f5f95841e78eafccccf1d36e43e.pdf ER -