Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 65, Issue 31, Pages 6404-6414Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.6b05819
Keywords
colloidal instability; apple juice; cider; pommeau; polyphenol; oxidation; aggregation; precipitate
Funding
- MAAF CasDAR
- UNICID
- French Institute of Cider Productions (IFPC)
- French National Institute for Agricultural Research (INRA)
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Producers of apple-based beverages are confronted with colloidal instability. Haze is caused by interactions between molecules that lead to the formation of aggregates. Haze composition in three apple-based beverages, namely, French sparkling cider, apple juice, and pommeau, was studied. Phenolic compounds, proteins, polysaccharides, and minerals were analyzed using global and detailed analytical methods. The results explained <75% (w/w) of haze dry mass. Polyphenols, represented mainly by procyanidins, were the main compounds identified and accounted for 10-31% of haze. However, oxidized phenolic compounds were probably underestimated and, may represent a high proportion of haze. Proteins were present in all of the samples in proportions of <6% of haze except in two apple juice hazes, where they were the main constituents (18 and 24%). Polysaccharides accounted for 0-30% of haze. Potassium and calcium were the main minerals.
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