Electroanalytical tools for antioxidant evaluation of red fruits dry extracts.
Red fruits are rich sources of antioxidant compounds with recognized health benefits. Since they are perishable, dried extracts emerge as more durable products and their quality control must include antioxidant capacity assays. In this study, the redox behavior of commercial dried products obtained from camu-camu, açai, acerola and cranberry red fruits was evaluated by electroanalytical approaches. The antioxidant potential was determined by 2,2-diphenyl-1-picrylhydrazyl free radical assay and the electrochemical index concept. The total phenol content was estimated by using a laccase based biosensor. A significant correlation was found between all methods and literature data. The voltammetric profile (cyclic, differential and square wave) obtained for each type of dried extract showed distinguishable features that were correlated with their main major markers, being also useful for identification purposes. The electrochemical methods were cheaper and more practical for evaluation of antioxidant properties and total phenol content in dried powders obtained from different red fruits.
Faculdade de Farmácia, Universidade Federal de Goiás, Rua 240 com 5a avenida, Setor Universitário, Goiânia, Goiás, Brazil.
Isaac Yves Lopes
IYL
de Macêdo
Faculdade de Farmácia, Universidade Federal de Goiás, Rua 240 com 5a avenida, Setor Universitário, Goiânia, Goiás, Brazil.
Luane Ferreira
LF
Garcia
Faculdade de Farmácia, Universidade Federal de Goiás, Rua 240 com 5a avenida, Setor Universitário, Goiânia, Goiás, Brazil.
Jerônimo Raimundo
JR
Oliveira Neto
Faculdade de Farmácia, Universidade Federal de Goiás, Rua 240 com 5a avenida, Setor Universitário, Goiânia, Goiás, Brazil.
Karla Carneiro
KC
de Siqueira Leite
Faculdade de Farmácia, Universidade Federal de Goiás, Rua 240 com 5a avenida, Setor Universitário, Goiânia, Goiás, Brazil.
Valdir Souza
VS
Ferreira
Faculdade de Farmácia, Universidade Federal de Goiás, Rua 240 com 5a avenida, Setor Universitário, Goiânia, Goiás, Brazil.
Paulo César
PC
Ghedini
Faculdade de Farmácia, Universidade Federal de Goiás, Rua 240 com 5a avenida, Setor Universitário, Goiânia, Goiás, Brazil. Electronic address: ericsgil@ufg.br.
Eric
E
de Souza Gil
D000975:Antioxidants / Q000032:analysis*; D001713:Biphenyl Compounds / Q000032:analysis; D005638:Fruit / Q000737:chemistry*; D010636:Phenols / Q000032:analysis; D010851:Picrates / Q000032:analysis; D010936:Plant Extracts / Q000032:analysis; D029799:Vaccinium macrocarpon / Q000737:chemistry
D000975:Antioxidants; D001713:Biphenyl Compounds; D010636:Phenols; D010851:Picrates; D010936:Plant Extracts; C004931:1,1-diphenyl-2-picrylhydrazyl
Antioxidant power assays; DPPH assay; Electrochemical index; Natural antioxidants; Redox behavior