Artículos de revistas
Electrochemical determination of the antioxidant capacity: The ceric reducing/antioxidant capacity (CRAC) assay
Fecha
2008Registro en:
ELECTROANALYSIS, v.20, n.12, p.1323-1329, 2008
1040-0397
10.1002/elan.200704182
Autor
FERREIRA, Rafael de Queiroz
AVACA, Luis Alberto
Institución
Resumen
The CRAC assay is a direct electron transfer test of antioxidant capacity for several organic compounds. The ability of eight different compounds in reducing Cc 41 was studied by chronoamperometric measurements of the remaining Ce(3+) species. The following antioxidant classification was observed: tannic acid >> quercetin > rutin > gallic acid approximate to catechin > ascorbic acid > BHA > Trolox. These results agree with others already published and a good correlation (R(2) = 0.937) was found with the classical spectrophotometric FRAP assay. The CRAC assay is simple, fast, free from sample pretreatment and applicable to nontransparent samples.