Table 5.
Weights of the variables for each Principal Component of PCA.
| PC1 (74.8%) |
PC2 (17.4%) |
PC3 (5.6%) |
|
|---|---|---|---|
| Gallic ac. | 0.212098 | 0.229747 | 0.405247 |
| p-Hidroxybenxoic ac. | 0.212616 | 0.285379 | 0.269082 |
| Syringic ac. | 0.260176 | 0.0537041 | 0.0704321 |
| Vanillic ac. | 0.249766 | 0.0422214 | 0.26319 |
| Vanillin | 0.248734 | −0.124367 | −0.108984 |
| Coniferyaldehyde | 0.235514 | −0.228758 | −0.129214 |
| Sinapaldehyde | 0.258133 | −0.0318904 | −0.161783 |
| Syringaldehyde | 0.210764 | −0.324929 | −0.0632737 |
| Furfural | 0.255016 | 0.0142459 | −0.225365 |
| 5-MF | 0.228023 | −0.191001 | −0.319289 |
| 5-HMF | 0.254304 | −0.0660727 | −0.195005 |
| TPI | 0.248244 | 0.182906 | 0.104234 |
| L* | −0.231347 | −0.259389 | −0.0834878 |
| a* | 0.219554 | 0.296211 | 0.120918 |
| b* | 0.259380 | 0.0432476 | −0.107897 |
| ΔE00 | 0.260317 | −0.0367621 | −0.040682 |
| Succinic ac. | 0.216806 | −0.293651 | 0.0711698 |
| Lactic ac. | −0.073157 | −0.444863 | 0.491908 |
| Acetic ac. | 0.137467 | −0.412107 | 0.383191 |