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Titolo:
Mass balance of gaseous and particulate products analysis from alpha-pinene/NOx/air in the presence of natural sunlight
Autore:
Jaoui, M; Kamens, RM;
Indirizzi:
Univ N Carolina, Dept Environm Sci & Engn, Chapel Hill, NC 27599 USA Univ N Carolina Chapel Hill NC USA 27599 Engn, Chapel Hill, NC 27599 USA
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
fascicolo: D12, volume: 106, anno: 2001,
pagine: 12541 - 12558
Fonte:
ISI
Lingua:
ENG
Soggetto:
GAS-PHASE REACTIONS; POLYCYCLIC AROMATIC-HYDROCARBONS; CIS-PINIC ACID; BETA-PINENE; NO3 RADICALS; ATMOSPHERIC OXIDATION; AEROSOL FORMATION; OH RADICALS; SECONDARY AEROSOLS; HYDROXYL RADICALS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
55
Recensione:
Indirizzi per estratti:
Indirizzo: Jaoui, M Univ N Carolina, Dept Environm Sci & Engn, Chapel Hill, NC 27599 USA Univ N Carolina Chapel Hill NC USA 27599 apel Hill, NC 27599 USA
Citazione:
M. Jaoui e R.M. Kamens, "Mass balance of gaseous and particulate products analysis from alpha-pinene/NOx/air in the presence of natural sunlight", J GEO RES-A, 106(D12), 2001, pp. 12541-12558

Abstract

The daytime oxidation of a-pinene in the presence of natural sunlight and oxides of nitrogen, NOx, was studied in a large outdoor smog chamber using gas chromatograph mass spectrometry as method of identification and quantification. A Scanning Mobility Particle Sizer system (3936, TSA) and a Condensation Particle Counter (3025A, TSA) were used to study the secondary organic aerosol formation, and a filter pack/denuder sampling system was used for simultaneously collecting gas phase and particle phase products for analysis. A gas chromatograph coupled to an electron impact mass spectrometry (GC-EIMS) method is described for the identification and quantification of gas and aerosol products. The sensitivity of the method was sufficient to produce good quality mass spectra over the range of concentrations used in this study, and compares very well with classical methods based on derivatization and liquid chromatography-ion trap mass spectroscopy methods. Mass balances for gaseous and aerosol reaction products are reported over the courseof the reaction. More than 16 products were identified and quantified in this study. On average, measured gas and particle phase products accounted for similar to 54% to similar to 71% of the carbon reacted alpha -pinene. Measurements show that 10-hydroxypinonic acid, 10-hydroxypinonaldehyde, 4-oxopinonic acid, and 10-oxopinonic acid are observed in the early stage in theaerosol phase and may play an important role in the early formation of secondary aerosols.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/18 alle ore 08:12:39