The physico-chemical properties of strawberry tree (Arbutus unedo L.) fruits

摘要

The physico-chemical properties of ripe fruits of strawberry tree (Arbutus unedo L.) were determined. The water content, ash, crude fat, proteins, total phenols, sugar, and the content of vitamin C were determined in ripe strawberry tree fruits. Fruits contain 46.7 % of water, 23.5 % of soluble solids, 0.48 % of ash, 118.61 mg/100 g of potassium, 20.63 mg/100 g of sodium, 36.05 mg/100 g of calcium, 9.66 mg/100 g of magnesium, 1.29 mg/100 g of iron, 19.99 mg/100 g of phosphorus, 0.45 mg/100 g of zinc, 0.99 mg/100 g of manganese, 0.99 mg/100 g of chromium, 0.10 mg/100 g of nickel, 1.32 mg/100 g of lead and 0.10 mg/100 g of cadmium. Among nutritionally important components found in fruits were: total fat (0.43 %), proteins (0.82 %), fibres (18.5 g/100 g) of which 14.3 g/100g was insoluble and 4.19 g/100 g was soluble fibre, titratable acids (5.1 mg/100 g), glucose (6.2 g/100 g) and fructose (17.2 g/100 g). Ripe fruits contained 271.5 mg/100 g vitamin C, of which 255.3 mg/ 100 g was L-ascorbic acid and 16.2 mg/100 g was dehydroascorbic acid.