Identification of isomeric polycyclic aromatic hydrocarbons (PAH) in pyrolysates from ethynylated PAH by gas chromatography-Fourier infrared spectroscopy. Their relevance for the understanding of PAH rearrangement and interconversion processes during combustion
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作者:
Visser, T
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机构:Univ Utrecht, Debye Res Inst, Dept Phys Organ Chem, NL-3584 CH Utrecht, Netherlands
Visser, T
Sarobe, M
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机构:Univ Utrecht, Debye Res Inst, Dept Phys Organ Chem, NL-3584 CH Utrecht, Netherlands
Sarobe, M
Jenneskens, LW
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机构:Univ Utrecht, Debye Res Inst, Dept Phys Organ Chem, NL-3584 CH Utrecht, Netherlands
Jenneskens, LW
Wesseling, JW
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机构:Univ Utrecht, Debye Res Inst, Dept Phys Organ Chem, NL-3584 CH Utrecht, Netherlands
Wesseling, JW
机构:
[1] Univ Utrecht, Debye Res Inst, Dept Phys Organ Chem, NL-3584 CH Utrecht, Netherlands
[2] Natl Inst Publ Hlth & Environm, Lab Organ Anal Chem, NL-3720 BA Bilthoven, Netherlands
`The utility of gas chromatography with infrared spectrometric detection (GC-IR) for the structural elucidation of pyrolysate constituents obtained by Flash Vacuum Pyrolysis (FVP; 900-1100 degrees C, 10(-2) Torr) of ethynylated Polycyclic Aromatic Hydrocarbons (E-PAH) is demonstrated. E-PAH are efficient precursors for ubiquitous and genotoxic C14H8, C16H10 and C20H12 cyclopenta-fused PAH (CP-PAH) combustion effluents. The formation of CP-PAH from E-PAH as well as CP-PAH rearrangements and/or interconversions are readily recognized. GC-IR being complementary to GC-MS enables the identification and structural assignment of previously undetected isomeric PAH, which are only present in trace-level amounts. The results are of interest for the elucidation of PAH build up processes and for the rationalization of the ubiquitous formation of a distinct set of PAH during combustion. (C) 1998 Elsevier Science Ltd. All rights reserved.