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.

Download the PDF

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…

Three new Apulian seedless varieties available for the table grape supply chain

The table grape industry in Europe is undergoing significant changes. For instance, in Italy, the national register of vine varieties was established in 1969, and since then, many varieties of table grapes have been registered. In the first thirty years, from 1969 to 1999, 62 seeded and 24 seedless varieties were registered. In the subsequent period, from 2000 to the present day, 23 seeded varieties and 99 seedless varieties were registered.

Read More

The Australian geographical indication process

The first white settlers arrived in Australia in 1788 and brought grape vine cuttings with them. As migration to Australia continued to grow during the XIX Century more and more vine cuttings, viticulturists and winemakers from Britain, France, Germany, ltaly, Switzerland and Yugoslavia founded their businesses.

Read More

Identification of novel aromatic precursors in winemaking grapes using an optimized fractionation and UHPLC-MS analysis

Winemaking grapes contain a diverse array of non-volatile precursors that become noticeable only after hydrolysis reactions or molecular rearrangements, during which aroma compounds are generated and released [1]. Among these, glycosidic precursors are the most abundant and play a key role in the development of wine aroma [2].

Read More

Evaluating South African Chenin blanc wine styles using an LC-MS screening method

Sorting Chenin blanc is one of the most important white wine cultivars in South Africa. It has received a lot of attention and accolades in the past years and more research than ever is dedicated to this versatile cultivar. According to the Chenin blanc association of South Africa, there are three recognized dry wine styles, Fresh and Fruity (FF), Rich and Ripe Unwooded
(RRU), and Rich and Ripe Wooded (RRW). They are traditionally established with the aid of expert sensory evaluation, but the cost and the (subjective) human factor are aspects to be taken into account. A more objective and possibly robust way of assessing and attributing these styles can be the use of chemical analysis.

Read More

Cultures des vignobles en forte pente: possibilités de mécanisation. Effet de l’exposition et de l’orientation des rangs

Plus de la moitié du vignoble suisse (14’000 ha) est situé sur des coteaux en forte pente (> 30%). Dans certains vignobles, la pente naturelle du terrain a été réduite par la construction de terrasses soutenues par des murs.

Read More