Fast screening for presence of muddy/earthy odorants in wine and in wine must using a hyphenated gas chromatography-differential ion mobility spectrometry (GC/DMS) |
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Authors: | Malick Camara Nasser Gharbi Emmanuelle Cocco Cedric Guignard Marc Behr Daniele Evers Pierre Orlewski |
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Institution: | (1) Department of Research in Automotive Equipments, Centre de Recherche Public Gabriel Lippmann, 41 rue de Brill, 4422 Belvaux, Luxemburg;(2) Department of Environment and Agro-biotechnologies, Centre de Recherche Public Gabriel Lippmann, 41 rue de Brill, 4422 Belvaux, Luxemburg |
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Abstract: | Rapid, hyphenated detection techniques involving a gas chromatograph (GC) coupled to a classical time-of-flight ion mobility
(IMS) spectrometer, or more recently, to a micro-machined, miniature differential ion mobility spectrometer (DMS) are quite
attractive for in-situ detection of many kinds of volatile organic compounds (VOCs) of concern and notably of natural contaminants appearing in
the headspaces of selected foodstuff. This work aims at a rapid detection, identification and quantification of geosmin in
the headspace of grape must and of wine. Samples of white and red wines have both been analyzed with a hyphenated GC/DMS and
by Solid Phase Micro-Extraction (SPME) coupled to GC/MS taken as a reference. The detection of geosmin at concentrations below
the human olfactory threshold of 50 ng/L has been demonstrated. |
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