Table 7.
Principal component analysis (PCA) factor loadings for the quality factors of analysed oils.
| Parameter | PC1 | PC2 |
|---|---|---|
| PV | 0.89 | 0.05 |
| AnV | 0.30 | 0.07 |
| TOTOX | 0.90 | 0.04 |
| K232 | 0.63 | 0.09 |
| K268 | 0.68 | 0.00 |
| MUFA | 0.01 | 0.90 |
| PUFA | 0.01 | 0.95 |
| SFA | 0.42 | 0.01 |
| C18:2 | 0.31 | 0.10 |
| C18:3 | 0.40 | 0.23 |
| TPC | 0.49 | 0.00 |
| DPPH | 0.41 | 0.04 |
| ABTS | 0.07 | 0.06 |
| Ea | 0.53 | 0.10 |
| k at 100 °C | 0.45 | 0.43 |
| IT at 100 °C | 0.90 | 0.03 |
Values in bold correspond for each variable to the factor for which the squared cosine is the largest. PV—peroxide value; p-AnV—p-anisidine value; TOTOX—total oxidation indictor; K232 and K268—specific extinction coefficient at wavelength λ = 232 and 268. MUFA—monounsaturated fatty acids; PUFA—polyunsaturated fatty acids; SFA—saturated fatty acids; TPC—total phenolic content; DPPH—antioxidants activity measured using DPPH radicals; ABTS—antioxidants activity measured using ABTS radicals; Ea—activation energy; k—reaction rate coefficient; IT—induction time.