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Anal Chim Acta

Title:		Solid phase extraction in combination with comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry for the detailed investigation of volatiles in South African red wines
Author(s):		Weldegergis BT; Crouch AM; Gorecki T; de Villiers A;
Address:		"Department of Chemistry and Polymer Science, University of Stellenbosch, Stellenbosch, South Africa"
Journal Title:		Anal Chim Acta
Year:		2011
Volume:		20110615
Issue:		1
Page Number:		98 - 111
DOI:		10.1016/j.aca.2011.06.006
ISSN/ISBN:		1873-4324 (Electronic) 0003-2670 (Linking)
Abstract:		"Comprehensive two-dimensional gas chromatography in combination with time-of-flight mass spectrometry (GCxGC-TOFMS) has been applied for the analysis of volatile compounds in three young South African red wines. In spite of the significant benefits offered by GCxGC-TOFMS for the separation and identification of volatiles in such a complex matrix, previous results utilizing headspace solid phase micro extraction (HS-SPME) demonstrated certain limitations. These were primarily associated with the choice of sample preparation technique, which failed to extract some influential semi-volatile wine constituents. Therefore, in the current report, we utilized solid phase extraction (SPE) in combination with GCxGC-TOFMS for the detailed investigation of particularly low-level semi-volatiles in South African wine. 214 compounds previously reported in grapes and related beverages were tentatively identified based on mass spectral data and retention indices, while 62 additional compounds were positively identified using authentic standards. The method proved particularly beneficial for the analysis of terpenes, lactones and volatile phenols, and allowed us to report the presence of numerous volatile compounds for the first time in Pinotage wines"
Keywords:		*Gas Chromatography-Mass Spectrometry *Solid Phase Microextraction South Africa Volatile Organic Compounds/*analysis Wine/*analysis;
Notes:		"MedlineWeldegergis, Berhane T Crouch, Andrew M Gorecki, Tadeusz de Villiers, Andre eng Netherlands 2011/07/19 Anal Chim Acta. 2011 Sep 2; 701(1):98-111. doi: 10.1016/j.aca.2011.06.006. Epub 2011 Jun 15"