3.7. Extracts/fractions and reference antioxidants
Three different standards known for their good antioxidant activity, trolox, ascorbic acid and quercetin
were used. These standards were suggested by Parejo
et al. (2000) who used them to evaluate scavenging activity by luminol chemiluminescence and DPPH assays.
The radical scavenging activity of the standards increased in the following order: Ascorbic acid < Trolox <
Quercetin.