Characterization of flame-generated C10 to C160 polycyclic aromatic hydrocarbons by atmospheric-pressure chemical ionization mass spectrometry with liquid introduction via heated nebulizer interface

From National Research Council Canada

DOIResolve DOI: http://doi.org/10.1016/1044-0305(95)00651-6
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Name affiliation
  1. National Research Council Canada. NRC Institute for Marine Biosciences
TypeArticle
Journal titleJournal of the American Society for Mass Spectrometry
ISSN1044-0305
1879-1123
Volume7
Issue3
Pages276–286
Abstract
Complex mixtures of polycyclic aromatic hydrocarbons (PAHs) generated from fuel-rich combustion of ethylene-naphthalene mixtures in a jet-stirred-plug-flow reactor were chemically characterized by combined mass spectrometric techniques to yield product composition data that cover the molecular mass region from simple PAHs (naphthalene, 128 u) to large molecules comparable in molecular size (1792 u) to nanoparticles of soot. Two techniques based on atmospheric-pressure chemical ionization mass spectrometry (APCI-MS) were investigated: (1) APCI-MS combined with high-performance liquid chromatography through a heated nebulizer interface was found suitable for PAHs up to C36 (448 u). (2) For the characterization of larger PAHs beyond C36, direct liquid introduction (DLI) of sample into an atmospheric-pressure chemical ionization mass spectrometer through a heated nebulizer gave protonated molecular ions for PAHs over the m/z 400–2000 range. Although unequivocal elemental composition information is unattainable from the unit-resolution DLI/APCI-MS data, by starting with structural data from identified C16 to C32 PAHs, and applying PAH molecular growth principles, it was possible to generate PAH molecular maps from the DLI/APCI-MS data from which values for the elemental composition could be derived for all major peaks.
Publication date
PublisherScienceDirect
LanguageEnglish
Peer reviewedYes
NPARC number23000948
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Record identifier484cb2fe-b513-48ca-9310-805952451a6c
Record created2016-11-21
Record modified2016-11-21
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