The DPPH free radical scavenging model can be used to
evaluate the antioxidant activity in a relatively short time.
DPPH is a stable free radical and accepts either an electron or
OH* to become a stable diamagnetic molecule The
decreased absorbance results in a color change from purple to
yellow, as radicals were scavenged by antioxidants through
the donation of hydrogen to form the stable DPPH molecule