Effects of olive wastewater and pomace extracts, lecithin, and ascorbyl palmitate on the oxidative stability of refined sunflower oil

摘要

In this study, the effects of olive mill wastewater (OMW) and olive pomace (OP) extracts(1 and 2 mg/g), lecithin (L, 1–5 mg/g), and ascorbyl palmitate (AP, 0.2 mg/g) on the oxidativestability of refined sunflower oil (SFO) and its purified triacylglycerols (TAGs) wereinvestigated under accelerated oxidation conditions. Induction period of TAGs increasedfrom 6.84 to 11.27 hr, with OMW methanol extract (1 mg/g), while OP extracts providedless protection (9.79 hr) at 90℃ in Rancimat. The K_(232) values of the SFO with extracts(1 mg/g) and AP (0.2 mg/g) was lower than those of butylated hydroxytoluene (BHT),butylated hydroxyanisole (BHA), and α‐tocopherol containing oil samples at 60℃. Binarycombinations of extracts with AP (0.2 mg/g) or L (5 mg/g) also effectively decreased theK_(232) and K_(270) values of TAGs during oxidation. In conclusion, OMW and OP extracts canbe synergistically used with L or AP for stabilization of SFO against oxidation.