Chemical characterization of Valencia, Salustiana and Lane Late sweet oranges fruits in Frederico Westphalen-RS

The chemical characterization of peel and pulp of Valencia Lane Late and Salustiana sweet oranges [Citrus sinensis (L.) Osbeck], grafted on Poncirus trifoliata (L.) Raf. grown in Polo citrus collection of Technological Modernization of Medium High Uruguay. The experiment was conducted under geographic coordinates 27°22 ‘S; 53°25’ W, 480 m above sea level, the city of Frederico Westphalen - RS. The climate, according to Köppen classification is Cfa, tropical without dry season and temperature of the warmest month greater than 22 ° C. It was found that the juice of the show a considerable content of ascorbic acid, to 40.71 mg.100 mL-1, at Salustiana sweet orange. Moreover, they are significant sources of polyphenols and also have high antioxidant activity, with higher values in the pulp. The Salustiana cultivar reached the highest polyphenol content, 51.1%. However, it was found that none of the other cultivars showed significant levels of carotenoids, reaching levels of up to 0.64 g mg.100-1 in the albedo of the Salustiana. Thus, it can be concluded that the residues of other species have chemical characteristics that enable their reuse as a source of polyphenols as well as an antioxidant.