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Potassium bitartrate crystallisation in wine and its inhibition

Potassium bitartrate crystallisation in wine and its inhibition Supersaturation of wine with dissolved tartaric acid is an essential requirement for crystallisation of potassium bitartrate and can be thought of as the driving force. Nucleation must occur, however, before potassium bitartrate crystals can grow and precipitate out of solution. In recent years, wine additives capable of inhibiting potassium bitartrate crystallisation have been commercially available. In this review, the established mechanisms involved in crystallisation are discussed, as they are essential for correctly interpreting the inhibitory effect that wine colloids and additives, such as mannoproteins and carboxymethylcellulose, can have upon potassium bitartrate crystal growth. The wine additive carboxymethylcellulose, in particular, is discussed in detail, as this additive is being trialled increasingly by winemakers since its approval for winemaking. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Australian Journal of Grape and Wine Research Wiley

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Publisher
Wiley
Copyright
Copyright © 2015 Australian Society of Viticulture and Oenology Inc.
ISSN
1322-7130
eISSN
1755-0238
DOI
10.1111/ajgw.12194
Publisher site
See Article on Publisher Site

Abstract

Supersaturation of wine with dissolved tartaric acid is an essential requirement for crystallisation of potassium bitartrate and can be thought of as the driving force. Nucleation must occur, however, before potassium bitartrate crystals can grow and precipitate out of solution. In recent years, wine additives capable of inhibiting potassium bitartrate crystallisation have been commercially available. In this review, the established mechanisms involved in crystallisation are discussed, as they are essential for correctly interpreting the inhibitory effect that wine colloids and additives, such as mannoproteins and carboxymethylcellulose, can have upon potassium bitartrate crystal growth. The wine additive carboxymethylcellulose, in particular, is discussed in detail, as this additive is being trialled increasingly by winemakers since its approval for winemaking.

Journal

Australian Journal of Grape and Wine ResearchWiley

Published: Dec 1, 2015

Keywords: ; ; ;

References