Table 4.
Variables with high contribution to factor 1 and 2 in PCA, their loading values and sample groups with which these are correlated
| Volatile compounds | Sample group | Loading values | |
|---|---|---|---|
| F1 | F2 | ||
| Isovaleric acid | MT0, NST24 and ST24 | −0.073760 | −0.772098 |
| 1-Pentanolg | MT0, NST24 and ST24 | −0.937031 | −0.296206 |
| 1-Hexanol | MT0, NST24 and ST24 | −0.931785 | −0.297974 |
| 1-Octen-3-ol | MT0, NST24 and ST24 | −0.947265 | −0.289980 |
| 1-Heptanol | MT0, NST24 and ST24 | −0.918735 | −0.279695 |
| 2-Ethyl-1-hexanol | MT0, NST24 and ST24 | −0.833305 | −0.327027 |
| 1-Octanol | MT0, NST24 and ST24 | −0.722133 | −0.633091 |
| cis-2-Octen-1-ol | MT0, NST24 and ST24 | −0.903878 | −0.366522 |
| Benzyl alcohol | MT0, NST24 and ST24 | −0.948099 | −0.270730 |
| 2-Furfuraldehyde | MT0, NST24 and ST24 | −0.881613 | −0.358810 |
| Cinnamaldehyde | MT0, NST24 and ST24 | −0.917130 | −0.040580 |
| 2-Pentanone | MT0, NST24 and ST24 | −0.855324 | −0.324833 |
| 2-Pentylfuran | MT0, NST24 and ST24 | −0.899011 | −0.271896 |
| 3-Octanone | MT0, NST24 and ST24 | −0.915904 | −0.067750 |
| 2-Octanone | MT0, NST24 and ST24 | −0.845447 | −0.325230 |
| trans-2,2-Pentenyl-furan | MT0, NST24 and ST24 | −0.921479 | −0.281489 |
| 6-Methyl-5-hepten-2-one | MT0, NST24 and ST24 | −0.204803 | −0.798575 |
| 6-Methyl-3,5-heptadiene-2-one | MT0, NST24 and ST24 | −0.928428 | −0.290765 |
| γ-Butyrolactone | MT0, NST24 and ST24 | −0.928418 | −0.274416 |
| β-Damascenone | MT0, NST24 and ST24 | −0.909969 | −0.366544 |
| 1R-α-Pinene | MT0, NST24 and ST24 | −0.558796 | −0.619010 |
| Cymene | MT0, NST24 and ST24 | −0.892236 | −0.335194 |
| 2-Bornene | MT0, NST24 and ST24 | −0.944324 | −0.309547 |
| Linalool | MT0, NST24 and ST24 | −0.836326 | −0.387011 |
| Coumaran | MT0, NST24 and ST24 | −0.165912 | −0.885934 |
| n.i. (m/z 67, 85, 151) | MT0, NST24 and ST24 | −0.517886 | −0.685602 |
| Acetaldehyde ethyl amyl acetal | ST48, ST72, ST144 and ST192 | 0.819661 | −0.109366 |
| Acetic acid | ST48, ST72, ST144 and ST192 | 0.252113 | −0.805874 |
| Propanoic acid | ST48, ST72, ST144 and ST192 | 0.094181 | −0.623983 |
| Hexanoic acid | ST48, ST72, ST144 and ST192 | 0.346509 | −0.905755 |
| Octanoic acid | ST48, ST72, ST144 and ST192 | 0.692898 | −0.681746 |
| Decanoic acid | ST48, ST72, ST144 and ST192 | 0.727791 | −0.604349 |
| 1-Propanol | ST48, ST72, ST144 and ST192 | 0.920658 | −0.026868 |
| 4-Ethylbenzyl alcohol | ST48, ST72, ST144 and ST192 | 0.597740 | −0.638649 |
| 1-Decanol | ST48, ST72, ST144 and ST192 | 0.590222 | −0.636173 |
| Propyl acetate | ST48, ST72, ST144 and ST192 | 0.925594 | −0.128528 |
| Isoamyl acetate | ST48, ST72, ST144 and ST192 | 0.874614 | −0.211771 |
| Amyl acetate | ST48, ST72, ST144 and ST192 | 0.586742 | −0.624018 |
| Hexyl acetate | ST48, ST72, ST144 and ST192 | 0.508613 | −0.609353 |
| Heptyl acetate | ST48, ST72, ST144 and ST192 | 0.448069 | −0.582699 |
| Octyl acetate | ST48, ST72, ST144 and ST192 | 0.576516 | −0.627550 |
| Nonyl acetate | ST48, ST72, ST144 and ST192 | 0.574227 | −0.624231 |
| Decyl acetate | ST48, ST72, ST144 and ST192 | 0.746226 | −0.642165 |
| 2-Phenylethanol acetate | ST48, ST72, ST144 and ST192 | 0.570674 | −0.573411 |
| Ethyl butyrate | ST48, ST72, ST144 and ST192 | 0.884764 | −0.133885 |
| Ethyl hexanoate | ST48, ST72, ST144 and ST192 | 0.793592 | −0.597680 |
| Ethyl heptanoate | ST48, ST72, ST144 and ST192 | 0.878184 | −0.376239 |
| Ethyl octanoate | ST48, ST72, ST144 and ST192 | 0.769181 | −0.604613 |
| Ethyl 7-octenoate | ST48, ST72, ST144 and ST192 | 0.819209 | −0.346015 |
| Ethyl undecanoate | ST48, ST72, ST144 and ST192 | 0.737432 | −0.588533 |
| Isoamyl hexanoate | ST48, ST72, ST144 and ST192 | 0.743734 | −0.637847 |
| Methyl hexanoate | ST48, ST72, ST144 and ST192 | 0.541028 | −0.641413 |
| Methyl decanoate | ST48, ST72, ST144 and ST192 | 0.635654 | −0.697817 |
| Propyl hexanoate | ST48, ST72, ST144 and ST192 | 0.727725 | −0.671690 |
| Propyl octanoate | ST48, ST72, ST144 and ST192 | 0.752368 | −0.645882 |
| Isobutyl hexanoate | ST48, ST72, ST144 and ST192 | 0.693044 | −0.670428 |
| Isobutyl octanoate | ST48, ST72, ST144 and ST192 | 0.750106 | −0.624371 |
| TDN | ST48, ST72, ST144 and ST192 | 0.418331 | −0.738714 |
| Citronellol | ST48, ST72, ST144 and ST192 | 0.877780 | −0.324558 |
| n.i. (m/z 69, 93, 121) | ST48, ST72, ST144 and ST192 | 0.581783 | −0.628157 |
| 3-Methylthio-1-propanol | NST48 and NST72 | −0.007238 | 0.652629 |
| Acetofenone | NST48 and NST72 | −0.931971 | 0.104946 |
| Ethanol | NST144 and NST192 | 0.923472 | 0.251117 |
| Isobutanol | NST144 and NST192 | 0.280307 | 0.860025 |
| 2-Methyl-1-butanol | NST144 and NST192 | 0.868649 | 0.436190 |
| 3-Methyl-1-butanol | NST144 and NST192 | 0.444480 | 0.808629 |
| 6-Methyl-5-hepten-2-ol | NST144 and NST192 | 0.357365 | 0.703500 |
| 2-Phenylethanol | NST144 and NST192 | 0.644828 | 0.588573 |
| Ethyl acetate | NST144 and NST192 | 0.617928 | 0.574295 |
| Ethyl propanoate | NST144 and NST192 | 0.264100 | 0.835185 |
| Ethyl 2-methylpropanoate | NST144 and NST192 | 0.166192 | 0.932632 |
| Ethyl phenylacetate | NST144 and NST192 | 0.364038 | 0.729613 |
| Ethyl tetradecanoate | NST144 and NST192 | 0.847124 | 0.055234 |
| Isoamyl propionate | NST144 and NST192 | 0.519286 | 0.655810 |
| Roseoxide | NST144 and NST192 | 0.444037 | 0.694096 |
| n.i. (m/z 59, 43) | NST144 and NST192 | 0.834766 | 0.393159 |