Carbohydrate and acid composition of some apple varieties

Authors

• Maija-Liisa Salo Department of Animal Husbandry, University of Helsinki
• Irmeli Korhonen Department of Animal Husbandry, University of Helsinki

DOI: https://doi.org/10.23986/afsci.71811

Abstract

Sugars, starch, hemicellulose polysaccharides, cellulose, crude lignin, titratable and total acidity and organic salts, crude protein and ash in five Finnish-grown and four imported apple varieties were determined. The main group of apple flesh proved to be sugar, 65—80 per cent of dry matter. Starch occurred only in negligible amounts. Hemicellulose accounted for 7—11 per cent, and almost all of it belonged to the pectin group. Xylan, cellulose and lignin together accounted for 4.5—6 per cent. The total of plant acids in the Finnish varieties was nearly 7 per cent. In the foreign varieties it was much lower. 20—35 per cent of the acids were in the form of salts. The titratable acidity was 55—80 per cent of the total acidity.