indicators of oil freshness and lipid peroxidation. The peroxide
value (POV) is a measure of total peroxides in oil and fat, expressed
as moles of active oxygen per kg of sample. The POV is rather
important for determining the oxidation level of lipids because
most of secondary oxidative products are generated via lipid
hydroperoxidation (Gotoh et al., 2011). The representative
approaches are listed as follows