Chemical composition and bioactive compounds of grape pomace (Vitis vinifera L.), Benitaka variety, grown in the semiarid region of Northeast Brazil
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Sociedade Brasileira de Ciência e Tecnologia de Alimentos
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Grape pomace (Vitis viniferaL.), Benitaka variety, grown in the semiarid region of Northeast Brazil was evaluated in relation tochemical composition, and content of minerals and functional properties.Its microbiological quality and toxic potential, usingArtemia salinasp, were also investigated. The results showed that the flour obtained from these residues had below neutral pH(3.82), moisture (3.33g/100g), acidity of (0.64g of citric acid/100g), and ash (4.65 g/100g). The amount of total dietary fiber(46.17g/100g) stood out quantitatively compared to the content of carbohydrate (29.2g/100 g), protein (8.49g/100g), and lipids(8.16g/100g). The total energy was 224Kcal/100g. With regard to the compounds with functional properties, higher values ofinsoluble fiber 79% (36.4 g/100 g); vitamin C (26.25 mg of acid ascorbic/100g), and anthocyanins (131mg/100g) were found.The minerals iron, potassium, zinc, manganese, and calcium were present in higher concentrations. There were no significantcopper values. The results showed that the grape residues are an important source of nutrients and compounds with functionalproperties suggesting that they can be incorporated as an ingredient in the diet and/or used as a dietary supplement aiming athealth benefits. The residues did not show microbiological contamination and were considered nontoxic.
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