| Title: | Organic aerosol molecular composition and gas-particle partitioning coefficients at a Mediterranean site (Corsica) |
| Author(s): | Rossignol S; Couvidat F; Rio C; Fable S; Grignion G; Savelli; Pailly O; Leoz-Garziandia E; Doussin JF; Chiappini L; |
| Address: | "Institut National de l'Environnement Industriel et des Risques (INERIS), 60 550 Verneuil-en-Halatte, France; LISA, UMR CNRS 7583, Universite Paris Est Creteil et Universite Paris Diderot, Institut Pierre Simon Laplace, Creteil, France. CEREA, Joint LaboratoryEcole des Ponts ParisTech/EDF R&D, Universite Paris-Est, 77455 Marne la Vallee, France. Institut National de l'Environnement Industriel et des Risques (INERIS), 60 550 Verneuil-en-Halatte, France. Qualitair Corse, Lieu-dit Lergie RN 200, 20250 Corte, France. Institut National de la Recherche Agronomique (INRA), 20230 San Giuliano, Corse, France. LISA, UMR CNRS 7583, Universite Paris Est Creteil et Universite Paris Diderot, Institut Pierre Simon Laplace, Creteil, France. Electronic address: jean-francois.doussin@lisa.u-pec.fr" |
| DOI: | 10.1016/j.jes.2015.11.017 |
| ISSN/ISBN: | 1001-0742 (Print) 1001-0742 (Linking) |
| Abstract: | "Molecular speciation of atmospheric organic matter was investigated during a short summer field campaign performed in a citrus fruit field in northern Corsica (June 2011). Aimed at assessing the performance on the field of newly developed analytical protocols, this work focuses on the molecular composition of both gas and particulate phases and provides an insight into partitioning behavior of the semi-volatile oxygenated fraction. Limonene ozonolysis tracers were specifically searched for, according to gas chromatography-mass spectrometry (GC-MS) data previously recorded for smog chamber experiments. A screening of other oxygenated species present in the field atmosphere was also performed. About sixty polar molecules were positively or tentatively identified in gas and/or particle phases. These molecules comprise a wide range of branched and linear, mono and di-carbonyls (C3-C7), mono and di-carboxylic acids (C3-C18), and compounds bearing up to three functionalities. Among these compounds, some can be specifically attributed to limonene oxidation and others can be related to alpha- or beta-pinene oxidation. This provides an original snapshot of the organic matter composition at a Mediterranean site in summer. Furthermore, for compounds identified and quantified in both gaseous and particulate phases, an experimental gas/particle partitioning coefficient was determined. Several volatile products, which are not expected in the particulate phase assuming thermodynamic equilibrium, were nonetheless present in significant concentrations. Hypotheses are proposed to explain these observations, such as the possible aerosol viscosity that could hinder the theoretical equilibrium to be rapidly reached" |
| Keywords: | Aerosols/*analysis/*chemistry Air Pollutants/*analysis/chemistry Bicyclic Monoterpenes Bridged Bicyclo Compounds/analysis Cyclohexenes/analysis Environmental Monitoring/methods France Gas Chromatography-Mass Spectrometry Gases/analysis/chemistry Limonene; |
| Notes: | "MedlineRossignol, Stephanie Couvidat, Florian Rio, Caroline Fable, Sebastien Grignion, Guillaume Savelli Pailly, Olivier Leoz-Garziandia, Eva Doussin, Jean-Francois Chiappini, Laura eng Netherlands 2016/03/13 J Environ Sci (China). 2016 Feb; 40:92-104. doi: 10.1016/j.jes.2015.11.017. Epub 2016 Jan 13" |
