THE MINERAL COMPOSITION OF CHILL HAZE PREPARATIONS
- 8 July 1965
- journal article
- research article
- Published by Chartered Institute of Brewers and Distillers in Journal of the Institute of Brewing
- Vol. 71 (4) , 299-304
- https://doi.org/10.1002/j.2050-0416.1965.tb02061.x
Abstract
The chill haze preparations examined contained between 0·7 and 3·0% of ash. Copper and iron appear to be the most significant cations in beer with regard to haze formation, as they act as catalysts in oxidation. Both are initially present in beer as complexes. Copper complexes have no catalytic activity in relation to oxidation of ascorbic acid but, on ageing, copper is released from the complex and catalytic activity increases. Iron complexes, on the other hand, are more active catalytically than are the free ions. Procedures used for ashing haze material require further study.Keywords
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