The reducing power may directly reflect the
activity of electron donors. The power to reduce
ferric ions (Fe3+) to ferrous ions (Fe2+) through the
donation of an electron was determined, and is
shown in Figure 3D for BPH as a function of DH.
Absorbance at 700 nm was measured to monitor
the Fe2+ concentration. Unhydrolysed BPC also
had reducing power, although lower than BPH. The
reducing power of BPH decreased with DH (p