Comparing with the PV values, the differences in AVs between
the nitrogen and air storage were relatively smaller, indicates that
the storage condition had a more significant effect on the generation
of primary oxidation products measured by PV, than on the
production of secondary oxidation products measured by AV.
Fig. 4 shows the % astaxanthin retention of powders stored
under both the air and nitrogen conditions. In the presence of air,
the % astaxanthin retention decreased from approximately 70% to