http://www.cnr.it/ontology/cnr/individuo/prodotto/ID42520
Separation and measurement of flame-formed high molecular weight polycyclic aromatic hydrocarbons by size-exclusion chromatography and laser desorption/ionization time-of-flight mass spectrometry. (Articolo in rivista)
- Type
- Label
- Separation and measurement of flame-formed high molecular weight polycyclic aromatic hydrocarbons by size-exclusion chromatography and laser desorption/ionization time-of-flight mass spectrometry. (Articolo in rivista) (literal)
- Anno
- 2006-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1002/rcm.2419 (literal)
- Alternative label
Apicella, B.; Millan, M.; Herod, A. A.; Carpentieri, A.; Pucci, P.; Ciajolo, A. (2006)
Separation and measurement of flame-formed high molecular weight polycyclic aromatic hydrocarbons by size-exclusion chromatography and laser desorption/ionization time-of-flight mass spectrometry.
in RCM. Rapid communications in mass spectrometry
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Apicella, B.; Millan, M.; Herod, A. A.; Carpentieri, A.; Pucci, P.; Ciajolo, A. (literal)
- Pagina inizio
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- Rivista
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- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Istituto di Ricerche sulla Combustione IRC-CNR
Dipartimento di Ingegneria Chimica - Facoltà di Ingegneria - Università di Napoli Federico II (literal)
- Titolo
- Separation and measurement of flame-formed high molecular weight polycyclic aromatic hydrocarbons by size-exclusion chromatography and laser desorption/ionization time-of-flight mass spectrometry. (literal)
- Abstract
- The partial contribution of polycyclic aromatic hydrocarbons (PAH), capable of being detected by gas
chromatography (GC-PAH), both to the total mass of the extractable organic fraction of flame-formed
carbon particulates and to its UV-visible absorption and fluorescence spectra, has been determined
by previous work. This contribution indicates the presence of PAH of molecular weight (MW) greater
than 400Da not accessible to conventional analysis. The detection of species in this higherMWrange
is important for both their potential toxicology and their possible role in soot formation. In the
present work extracts of soots have been analyzed by linear mode laser desorption/ionization timeof-
flight mass spectrometry (LDI-TOF-MS) to extend theMWrange that can be analyzed beyond the
GC-PAH. The results have been compared with both analysis by reflector mode LDI-TOF-MS and the
MW evaluation obtained by SEC analysis, as the shortcomings and advantages of both techniques
appear to be complementary. Matching the results from the two techniques could give interesting
insights in the molecular mass range between GC-PAH and the first soot particles (of mass > 2000 Da).
Mass spectra in this molecular mass range have been obtained with a main ion sequence spacing of
24 Th and a minor ion sequence also with a spacing of 24 Th but off-set by 12 Th with respect to the
main sequence. The two ion progressions have been interpreted by attributing the predominant
peaks mainly to PAH with even-carbon numbers and the smaller ones to cyclopenta-fused ring PAH.
These distributions indicate the occurrence of two competitive mechanisms in the growth of PAH
and soot nucleation, i.e. the addition of acetylene (HACA mechanism) and the incorporation of
pentagons by large polycyclic aromatic molecules into their aromatic bonding network. (literal)
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