| Two-dimensional gas chromatographic profiling as a tool for a rapid screening of the changes in volatile composition occurring due to microoxygenation of red wines. | |
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MedLine Citation:
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PMID: 20579499 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Microoxygenation (MOX) is a widely applied technique to deliver continuously trace amounts of oxygen to red wine during vinification and ageing in order to improve color stability and sensory properties. Proven by sensory means, the added oxygen modifies not only tannin structure and color of the wines, but also their composition of volatiles. In this study different microoxygenation treatments prior and after malolactic fermentation were carried out for Pinot noir, Cabernet Sauvignon and Dornfelder wines of the 2007 vintage. Volatile components of subsequent wines were analyzed using headspace-solid phase microextraction coupled to comprehensive two-dimensional gas chromatography-quadrupole mass spectrometry (GC x GC-qMS). Quantitative data were retrieved from two-dimensional images obtained from GC x GC chromatograms of volatile compounds applying a software package, which is commonly used in the field of proteomics for two-dimensional electrophoresis gels. This approach revealed a discrimination of the applied treatments by multivariate statistics based on volatiles alone, such as the clear distinction among wines treated before or after malolactic fermentation in case of Cabernet Sauvignon and Dornfelder or the effect of different oxygen doses. Besides the differentiation of MOX treatments from the untreated control, specific varietal and technological effects could be distinguished. The image processing of the GC x GC data offered valuable tools which were able to identify those areas in the 2D images that were most responsible for discrimination among different MOX treatments. Based on the loadings of individual aroma compounds a set of markers for the MOX-induced modifications of volatiles could be suggested. |
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Authors:
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Hans-Georg Schmarr; Jörg Bernhardt; Ulrich Fischer; Alexander Stephan; Patrick Müller; Dominik Durner |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-05-07 |
Journal Detail:
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Title: Analytica chimica acta Volume: 672 ISSN: 1873-4324 ISO Abbreviation: Anal. Chim. Acta Publication Date: 2010 Jul |
Date Detail:
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Created Date: 2010-06-28 Completed Date: 2010-09-17 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370534 Medline TA: Anal Chim Acta Country: Netherlands |
Other Details:
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Languages: eng Pagination: 114-23 Citation Subset: IM |
Copyright Information:
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Copyright 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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Dienstleistungszentrum Ländlicher Raum (DLR) Rheinpfalz, Viticulture and Enology Department, Breitenweg 71, D-67435 Neustadt a. d. Weinstrasse, Germany. hans-georg.schmarr@dlr.rlp.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Chromatography, Gas
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methods* Image Processing, Computer-Assisted Oxygen / chemistry* Software Volatile Organic Compounds / analysis* Wine / analysis* |
| Chemical | |
Reg. No./Substance:
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0/Volatile Organic Compounds; 7782-44-7/Oxygen |
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