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Mise au point d'un préleveur automatique pour la mesure en continu des composés carbonylés atmosphériques.

Abstract : Two sampling strategies were studied to develop an automatic instrument for the continuous measurement of atmospheric carbonyl compounds. Because of its specificity towards carbonyls compounds, sampling by using a tranfer of gaseous phase in a liquid phase associated with a simultaneous chemical derivatization of the trapped compounds was first studied. However, this method do not allow a quantitative sampling of all studied carbonyl compounds, nor a continuous measurement in the field. To overcome the difficulties, a second strategy was investigated: the cryogenic adsorption onto solid adsorbent followed by thermodesorption and a direct analysis by GC/MS. Collection efficiency using different solid adsorbents was found greater than 95% for carbonyl compounds consisting of 1 to 7 carbons. This work is a successful first step towards the realization of the automatic sampling device for a continuous measurement of atmospheric carbonyls compounds.
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https://tel.archives-ouvertes.fr/tel-00346977
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Submitted on : Saturday, December 13, 2008 - 2:50:27 AM
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Veronique Perraud. Mise au point d'un préleveur automatique pour la mesure en continu des composés carbonylés atmosphériques.. Océan, Atmosphère. Université de Provence - Aix-Marseille I, 2007. Français. ⟨tel-00346977⟩

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