Terroir 2004 banner
IVES 9 IVES Conference Series 9 TCA – A status report on South African cork closures

TCA – A status report on South African cork closures

Abstract

Cork taint decreases the commercial value of wine as tainted wines are rejected by consumers. Although other compounds in wine and cork can also be responsible for causing a taint, 2,4,6-trichloroanisole (TCA) is regarded as the primary cause of cork taint. As cork taint is often used in marketing campaigns against natural cork closures, manufacturers extended their overall quality control to monitoring TCA levels. Since August 2004 a representative sample of all batches of cork closures that are imported by members of the South African Cork Quality Council (SACQC) are tested for TCA before release into the market. Quality control on TCA is conducted by an independent laboratory, established by the Institute for Wine Biotechnology (Department of Viticulture and Oenology, University of Stellenbosch) and Thalès Wine Cellar Services (Pty) Ltd. In this contribution we report on the current status of TCA in cork closures in South Africa. The analytical methodologies as well as the quality control program that is currently implemented are also outlined.

DOI:

Publication date: January 12, 2022

Issue: Terroir 2004

Type: Article

Authors

J.A. Minnaar

Institute for Wine Biotechnology, University of Stellenbosch, Private Bag X1, Stellenbosch, 7600, South Africa

Contact the author

Tags

IVES Conference Series | Terroir 2004

Citation

Related articles…

Release and perception of γ-nonalactone and massoia lactone in the red wine matrix: impact of ethanol and acidity

Climate change (CC) is altering grape/wine composition, challenging wine sensory quality. Rising temperatures increase grape sugar levels, with higher wine ethanol (EtOH) contents, reduce total acidity (TA) converging with increased pH and lead to the accumulation of CC odorous markers such as γ-nonalactone (γ-C9) and massoia lactone (ML).

1H NMR spectroscopy data to discriminate Petit verdot wines from three different soil types in the São Francisco valley, Brazil

Tropical wines have been produced in the São Francisco river Valley thirty years ago, in the Northeast of Brazil. The main grape cultivar used for red tropical wines is ‘Syrah’, but wines have presented fast evolution, if they were made in the first or second semester, due to the high values of pH in grapes and wines and high climate temperatures.

Typology of wines in touch with environmental factors of terroirs and grapevine. Application to the Chinon vineyard

According to the vintage, it may be difficult for vine growers to make a decision regarding the type of wine in relation with the soils.

Evaluation of winegrape anthocyanins in the vineyard using a portable fluorimetric sensor: seasonal and water regime effects

Accumulation of anthocyanins (Anth) on whole winegrape (Vitis vinifera L.) bunches attached to the vine was monitored by a fluorescence-based sensor (Multiplex) on ‘Aleatico’ and ‘Nero d’Avola’. Different water regimes were applied.

Characterization of free and glycosidically bound simple phenols in hybrid grape varieties using liquid chromatography coupled to high resolution mass (q-orbitrap)

Vitis vinifera is one of the most diffused grapevines over the word and it is the raw material for high quality wines production. The availability of more resistant interspecific hybrid vine varieties, developed from crosses between Vitis vinifera and other Vitis species, has generating much interest, also due to the low environmental effect of production. However, hybrid grape wine composition and varietal differences between interspecific hybrids are not well defined. Different studies revealed that wine consumption has health effects due to its high content of antioxidants, as phenolic compounds. In particular, simple phenols are appreciated not only for their physiological health benefits, including antioxidant, anti-inflammatory and cardioprotective effects, but also because they affect wines organoleptic profile and have a significant role in defining their nutritional characteristics.