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J Agric Food Chem. 2013 Feb 6;61(5):1036-43. doi: 10.1021/jf303418q. Epub 2013 Jan 28.

Detection and quantification of natural contaminants of wine by gas chromatography-differential ion mobility spectrometry (GC-DMS).

Author information

  • 1Department of Research in Automotive Equipment, Centre de Recherche Public Gabriel Lippmann , 41 Rue du Brill, L-4422 Belvaux, Luxembourg.

Abstract

Rapid and direct, in situ headspace screening for odoriferous volatile organic compounds (VOCs) present in fresh grapes and in wines is a very promising method for quality control because the economic value of a wine is closely related to its aroma. Long used for the detection of VOCs in complex mixtures, miniature differential ion mobility spectrometry (DMS) seems therefore adequate for in situ trace detection of many kinds of VOCs of concern appearing in the headspace of selected foodstuffs. This work aims at a rapid detection, identification, and quantification of some natural and volatile contaminants of wine such as geosmin, 2-methylisoborneol (2-MIB), 1-octen-3-ol, 1-octen-3-one, and pyrazines (2-isopropyl-3-methoxypyrazine, IPMP, and 3-isobutyl-2-methoxypyrazine, IBMP). In the present study, these compounds were spiked at a known concentration in wine and analyzed with a hyphenated trap-GC-DMS device. The detection of all target compounds at concentrations below the human olfactory threshold was demonstrated.

PMID:
23356506
DOI:
10.1021/jf303418q
[PubMed - indexed for MEDLINE]
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