Compilation of databases of aroma compouds in the wines of six important cultivars

Project Number
WW 08-31

Project title
Compilation of databases of aroma compouds in the wines of six important cultivars

Project leader
Marais, J Burton, S Van Rensburg, P

Institution
University of Cape Town University of Stellenbosch. Faculty of AgriSciences. Institute for Wine Biotechnology

Project description
The ability to guarantee authenticity and detect fraud in foods and beverages is becoming increasingly important internationally. The recent scandal concerning illegal flavour addition to Sauvignon blanc wines, and persistent rumours concerning similar actions in other cultivar wines, reflected badly on the local industry. A repetition could seriously damage the export drive and lead to a loss of consumer confidence locally as well. Against this background the South African wine Industry was compelled to intervene and launch an investigation into ways and means of detecting aroma fraud in wine. The ability to detect fraudulent addition of aroma constituents to wine can only be based on an extensive knowledge of what naturally occurs in wine, hence the call for a research project on the aroma profiles of a number of cultivar wines.

The aim of this project is to compile comprehensive databases (‘finger-prints’) on aroma components in wines of the most important South African cultivars, originating from the various geographical regions. Simultaneously, new analytical methods will be investigated and developed for future analysis of wine volatiles. In addition, the composition of relevant flavour essences (commercial) and plant extracts will be examined to supply support data. The results of the research will assist authorities in future to detect fraud and prosecute offenders.

Poster(s)
Weldegergis, B T, Van Rensburg, P, Nieuwoudt, H H and Crouch, A M. 2006. Development and validation of analytical methods for the analysis of volatile compounds in South African wines. Poster presented at the 38th National Convention of the South African Chemical Institute. 3-8 December 2006, University of Kwazulu-Natal, Durban, South Africa.

Weldegergis, B T and Crouch, A M. 2008. Analysis of volatiles in Pinotage wines by stir bar sorptive extraction and chemometric profiling. Poster presented at the 32nd International Symposium on Capillary Chromatography and 5th GC × GC Symposium. 28-30 May 2008, Riva Del Garda, Italy.

Weldegergis, B T, De Villiers, A, Seethapathy, S, McNeish, C, Górecki, T and Crouch, A M. 2008. Characterization of South African Pinotage wines using GC × GC-TOFMS. Poster presented at the 32nd International Symposium on Capillary Chromatography and 5th GC × GC Symposium. 28-30 May 2008, Riva Del Garda, Italy.

Presentation(s)
Louw, L, Nieuwoudt, H H, Lambrechts, M G, Swanepoel, M, Naes, T and Van Rensburg, P. 2006. Profiles of the chemical composition of South African young wines. Paper presented at 3rd International Congress of the South African Society for Enology and Viticulture. 7-8 November 2005, Cape Town, South Africa.

Louw, L, Nieuwoudt, H H, Lambrechts, M G, Swanepoel, M, Naes, T and Van Rensburg,P. 2005. Profiles of the chemical composition of South African young wines. Paper presented at the 3rd International Congress of the South African Society for Enology and Enology. 7-8 November, Somerset West, South Africa.

Louw, L, Nieuwoudt, H H, Lambrechts, M G, Swanepoel, M, Naes, T and Van Rensburg, P. 2007. Profiles of the chemical composition of South African young wines.Paper presented at the 13th Australian Wine Industry Technical Conference. 28 July-2 August, Adelaide, Australia.

FinalReport.pdf

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