The antioxidant activities of the phenolic fractions were evaluated
using three common chemical model systems, i.e. FRAP, DPPH,
ORAC assays (Fig. 4). The antioxidant activities of the phenolic fractions
showed highly positive correlation with TPC, especially in the
FRAP and ORAC assays, with the correlation coefficient r2 values
ranging from 0.9865 to 0.9956; TPC and DPPH was also positive
with slightly lower r2 value between 0.8421 and 0.9076. FRAP
values displayed significantly higher activity in AHP than FP and
BHP fractions and was found to be comparable to values obtained
in common beans (Zhang et al., 2014). ORAC values of the FP, BHP
and AHP fractions were on the lower end when compared to