Table 3.
Pearson’s correlation between color difference (ΔE) and total antioxidant capacities
| ΔE | DPPH | ABTS | FRAP | Copper chelating activity | Total phenol content | Flavonoid content | |
|---|---|---|---|---|---|---|---|
| ΔE | 1.000 | ||||||
| DPPH | 0.978*** | 1.000 | |||||
| ABTS | 0.832*** | 0.874*** | 1.000 | ||||
| FRAP | 0.965*** | 0.986*** | 0.882*** | 1.000 | |||
| Copper chelating activity | 0.971*** | 0.971*** | 0.857*** | 0.960*** | 1.000 | ||
| Total phenol content | 0.864*** | 0.913*** | 0.960*** | 0.911*** | 0.890*** | 1.000 | |
| Flavonoid content | 0.953*** | 0.963*** | 0.774*** | 0.955*** | 0.948*** | 0.821*** | 1.000 |
DPPH, 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity; ABTS, 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radical scavenging activity; FRAP, ferric reducing antioxidant power.
***
Correlation is significant at the 0.001 level.