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Correlation coefficients between TPC, TFC and antioxidant capacity.
| TPC | TFC | DPPH | FRAP | CUPRAC | |
|---|---|---|---|---|---|
| TPC | 1 | 0.977 ** | 0.997 ** | 0.992 ** | 0.997 ** |
| TFC | 1 | 0.983 ** | 0.986 ** | 0.977 ** | |
| DPPH | 1 | 0.997 ** | 0.996 ** | ||
| FRAP | 1 | 0.993 ** | |||
| CUPRAC | 1 |
TPC: total phenolic acid content; TFC: total flavonoid content; DPPH: 2,2-diphenyl-1-picrylhydrazyl radical scavenging ability; FRAP: ferric reducing antioxidant power; CUPRAC: cupricion reducing capacity. ** Correlation is significant at the 0.01 level (2-tailed).
