Development of a parallel sampling and analysis method for the elucidation of gas/particle partitioning of oxygenated semi-volatile organics : a limonene ozonolysis study - Ineris - Institut national de l'environnement industriel et des risques
Article Dans Une Revue Atmospheric Measurement Techniques Année : 2012

Development of a parallel sampling and analysis method for the elucidation of gas/particle partitioning of oxygenated semi-volatile organics : a limonene ozonolysis study

Résumé

Gas/particle partitioning behaviour of secondary organic matter semi-volatile fraction and the associated multiphase chemistry are key features to accurately evaluate secondary organic aerosol climate and health impacts. However, today, oxygenated secondary species partitioning is rarely assessed in experimental SOA studies and SOA modelling is still largely based on estimated partitioning data. This paper describes a new analytical approach, solvent free and easy to use, to explore the chemical composition of the secondary organic matter at a molecular scale in both gas and particulate phases. The method is based on thermal-desorption (TD) of gas and particulate samples, coupled with gas chromatography (GC) and mass spectrometry (MS), with on sampling supports derivatisation processes. Gaseous compounds are trapped on PFBHA or MTBSTFA pre-coated Tenax TA adsorbent tubes. Particulate samples are collected onto quartz or Teflon-quartz filters and subsequently exposed to PFBHA or MTBSTFA derivatisation reagents before TD-GC-MS analysis. Method development and validation are presented from an atmospherically relevant range of organic acids and carbonyl and hydroxyl compounds. Method application to a limonene ozonolysis experiment conducted in the EUPHORE simulation chamber under close-to-real conditions of low concentrations and relative humidity provides an overview of the method abilities. 25 compounds have been positively or tentatively identified, 9 being in both gaseous and particulate phases and 11, among them tri carboxylic acids, hydroxyl dicarboxylic acids and oxodicarboxylic acids, being detected for the first time.
Fichier principal
Vignette du fichier
2012-137.pdf (2.78 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

ineris-00961778 , version 1 (20-03-2014)

Identifiants

Citer

Stéphanie Rossignol, Laura Chiappini, Emilie Perraudin, Caroline Rio, Sébastien Fable, et al.. Development of a parallel sampling and analysis method for the elucidation of gas/particle partitioning of oxygenated semi-volatile organics : a limonene ozonolysis study. Atmospheric Measurement Techniques, 2012, 5 (6), pp.1459-1489. ⟨10.5194/amt-5-1459-2012⟩. ⟨ineris-00961778⟩
207 Consultations
612 Téléchargements

Altmetric

Partager

More