期刊
ELECTROANALYSIS
卷 20, 期 12, 页码 1323-1329出版社
WILEY-BLACKWELL
DOI: 10.1002/elan.200704182
关键词
antioxidant capacity; metal reducing power; chronoamperometry; CRAC assay; diamond electrode
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.
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