Properties Refined silflower oil Refined sunflower oil
Oil analysis
Chlorophyll as pheophytin a (mg/Kg)
725.5 ± 2.4
0
Total polar compounds (TPC, %, w/w)
11.35 ± 0.01 a1
3.73 ± 0.02 b
ABTS assay (inhibition after 5 min), µmol TE/g
0.58 ± 0.02 b
0.84 ± 0.04 a
Total phenolics (mg GAE/g sample)
1.10 ± 0.40 a
0.47 ± 0.13 b
Squalene
4.19 ± 0.02
0
α-Tocopherols (μg/g)
333.4 ± 44.8 a
203.9 ± 2.0 b
Free fatty acid (%)
0.13 ± 0.01 a
0 b
Oxidative and thermal stabilities
Oxidative Stability Index (OSI) at 110 °C, hours
2.10 ± 0.01 b
2.69 ± 0.04 a
Thermal stability (onset temperature of degradation), °C
277.8 ± 1.3 a
287.2 ± 3.3 a