Correlation between total phenolic content, flavonoid content and antioxidant activity
From the Pearson correlation tests in table 3, there were a very strong positive and significant (p < 0.05) correlation found between total phenolic content and FRAP assay in both extracts (r = 0.969 for 60% ethanol extract; r = 0.973 for aqueous extract). In EC50 of DPPH assay, there was a very strong negative and significant correlation (p < 0.05) occur in 60% ethanol extract (r = -0.939) but no correlation was found in aqueous extract.