Antioxidant capacity and mineral content of pulp and peel from commercial cultivars of citrus from Brazil |
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Authors: | Helena Rudge de Moraes Barros,Tâ nia Aparecida Pinto de Castro Ferreira,Maria Iné s Genovese |
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Affiliation: | 1. Programa de Pós Graduação em Nutrição e Saúde, Faculdade de Nutrição, Universidade Federal de Goiás, Rua 227 Qd. 68 s/no. – Setor Leste Universitário, CEP: 74.605-08, Goiânia, GO, Brazil;2. Departamento de Alimentos e Nutrição Experimental, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580 – Bloco 14, Butantã, CEP: 05508-900, São Paulo, SP, Brazil |
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Abstract: | Four Citrus species (C. sinensis, cvs. Pera and Lima; C. latifolia Tanaka cv. Tahiti; C. limettioides Tanaka cv. Sweet lime and C. reticulate, cv. Ponkan) grown in Brazil were characterised in relation to contents of minerals, ascorbic acid, total polyphenols and antioxidant capacity of pulps and peels. In general, the peels demonstrated significantly higher contents of all compounds than the pulps (p < 0.05), with the exception of the Pera orange pulp that presented the highest acid ascorbic content (68 mg/100 ml), while the Tahiti lime peel presented the lowest (8 mg/100 g). Citrus showed high levels of potassium, calcium and magnesium, and the peels were considered sources of these minerals. The Ponkan mandarin peel presented the highest antioxidant capacity. The antioxidant capacity of citrus was correlated both to vitamin C and phenolics. Aside from citrus pulps, the peels are also good sources of bioactive compounds and minerals, and can be explored for their health promoting values in food products. |
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Keywords: | AA, ascorbic acid Ca, calcium Cu, copper DPPH, 2,2-diphenyl-1-picrylhydrazyl DRI, dietary reference intake Fe, iron FRAP, ferric reducing power FW, fresh weight K, potassium Mg, magnesium Mn, manganese MT, million tons SST, total soluble solids Na, sodium TA, titratable acidity TPTZ, 2,4,6-tripyridyl-s-triazine Trolox, 6-hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid Zn, zinc |
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