Evaluation of antioxidant activity of agro-industrial waste of acerola (Malpighia emarginata D.C.) fruit extracts

Ana Carla   da Silva CAETANO; Cristiane   Rodrigues de ARAÚJO; Vera Lúcia   Arroxelas Galvão de LIMA; Maria Inês   Sucupira MACIEL; Enayde   de Almeida MELO

Evaluation of antioxidant activity of agro-industrial waste of acerola (Malpighia emarginata D.C.) fruit extracts

Autores

Ana Carla da Silva CAETANO

Cristiane Rodrigues de ARAÚJO

Vera Lúcia Arroxelas Galvão de LIMA

Maria Inês Sucupira MACIEL

Enayde de Almeida MELO

Editor

Sociedade Brasileira de Ciência e Tecnologia de Alimentos

Descripción

This study was carried out to evaluate the antioxidant capacity of the agro-industrial waste from acerola. Hydroacetone, hydroethanolic, and hydromethanolic extracts were obtained using the sequential extraction process, and they were screened for their free radical DPPH• (1,1-diphenyl-2-picrilhidrazil) and ABTS•+ (2,2’-azino-bis-(3-etilbenzotiazolin 6-sulfonic acid) scavenging activity and their effect on the linoleic acid peroxidation by the ferric thiocyanate method. Soybean oil with the addition of the extracts (200 ppm) was submitted to Schaal oven test (60 °C, 28 days), in which the samples were analyzed for peroxide value and conjugated dienes. Hydroethanolic and hydromethanolic extracts exhibited good DPPH scavenging activity (low value of EC50 and TEC50 and high value of AE), good ABTS scavenging capacity (1445.1 and 1145.5 μMol TEAC.g–1, respectively), and high percentage inhibition of peroxidation of linoleic acid (96.12 and 91.84%, respectively) and showed the ability to retard the formation of peroxides and conjugated dienes.