Table 3.
The contribution (loading) of the individual compounds in the principal components.
| No. | Compounds | PC 1 | PC 2 |
|---|---|---|---|
| 1 | propionaldehyde | 0.050355 | 0.055244 |
| 2 | acetone | 0.189714 | -0.05178 |
| 3 | butanal | 0.074659 | 0.172057 |
| 4 | ethanol | 0.001407 | 0.046004 |
| 5 | butane-2,3-dione (diacetyl) | -0.01853 | 0.004339 |
| 6 | acetic acid monomer | 0.083051 | 0.092754 |
| 7 | propylene glycol monomer | 0.044032 | 0.019738 |
| 8 | propylene glycol dimer | 0.049967 | 0.005458 |
| 9 | 2-ethyl-1-hexanol monomer | -0.03415 | -0.01378 |
| 10 | 2-ethyl-1-hexanol dimer | -0.00722 | 0.011439 |
| 11 | methyl 2-methylbutanoate | 0.025063 | -0.09877 |
| 12 | butyl acetate | 0.042726 | -0.05727 |
| 13 | 1-propanol | -0.01156 | -0.01195 |
| 14 | 2-heptanone monomer | -0.21066 | -0.32272 |
| 15 | 2-heptanone dimer | -0.13537 | -0.08821 |
| 16 | methyl furoate | -0.01718 | -0.02361 |
| 17 | benzaldehyde | -0.07521 | -0.0584 |
| 18 | 1-pentanol | -0.08013 | -0.18785 |
| 19 | octaldehyde | 0.017355 | -0.0834 |
| 20 | 1-octen-3-one | 0.104452 | 0.156615 |
| 21 | 1-hydroxypropan-2-one | -0.0003 | 0.011858 |
| 22 | hexyl propionate | -0.06992 | 0.015522 |
| 23 | 6-methylhept-5-en-2-one | 0.006436 | 0.396618 |
| 24 | 1-hexanol | 0.028065 | 0.054332 |
| 25 | nonanal monomer | -0.13261 | -0.19523 |
| 26 | nonanal dimer | -0.05661 | -0.07724 |
| 27 | 2-butoxyethanol monomer | 0.026583 | 0.014926 |
| 28 | 2-butoxyethanol dimer | 0.646389 | -0.25856 |
| 29 | β-damascenone | 0.401356 | -0.24762 |
| 30 | unknown compound 1 | -0.06852 | 0.090481 |
| 31 | unknown compound 2 | 0.093988 | -0.03953 |
| 32 | unknown compound 3 | -0.02304 | 0.017666 |
| 33 | unknown compound 4 | -0.08562 | -0.14485 |
| 34 | unknown compound 5 | -0.00115 | 0.033749 |
| 35 | unknown compound 6 | -0.00123 | -0.02978 |
| 36 | unknown compound 7 | -0.03973 | 0.079064 |
| 37 | unknown compound 8 | -0.05647 | 0.012563 |
| 38 | unknown compound 9 | -0.05132 | -0.0415 |
| 39 | unknown compound 10 | 0.050238 | 0.027312 |
| 40 | unknown compound 11 | -0.08041 | 0.026247 |
| 41 | unknown compound 12 | -0.13372 | 0.059354 |
| 42 | unknown compound 13 | 0.046238 | -0.00752 |
| 43 | unknown compound 14 | 0.07674 | -0.23755 |
| 44 | unknown compound 15 | 0.115308 | -0.11059 |
| 45 | unknown compound 16 | -0.03392 | 0.011965 |
| 46 | unknown compound 17 | 0.055787 | 0.078863 |
| 47 | unknown compound 18 | 0.115004 | 0.103553 |
| 48 | unknown compound 19 | 0.035116 | 0.006456 |
| 49 | unknown compound 20 | 0.1337 | 0.027291 |
| 50 | unknown compound 21 | 0.034969 | 0.081432 |
| 51 | unknown compound 22 | -0.09436 | -0.1517 |
| 52 | unknown compound 23 | 0.048473 | -0.0772 |
| 53 | unknown compound 24 | -0.01372 | -0.11803 |
| 54 | unknown compound 25 | 0.027581 | -0.05866 |
| 55 | unknown compound 26 | -0.09796 | 0.038877 |
| 56 | unknown compound 27 | -0.01917 | -0.02165 |
| 57 | unknown compound 28 | 0.089623 | 0.093334 |
| 58 | unknown compound 29 | 0.084957 | 0.060679 |
| 59 | unknown compound 30 | -0.06919 | -0.00227 |
| 60 | unknown compound 31 | 0.011818 | -0.0781 |
| 61 | unknown compound 32 | -0.11138 | -0.16598 |
| 62 | unknown compound 33 | -0.11583 | -0.2211 |
| 63 | unknown compound 34 | 0.011593 | 0.075623 |
| 64 | unknown compound 35 | -0.08221 | -0.03173 |
| 65 | unknown compound 36 | 0.05883 | -0.01156 |
| 66 | unknown compound 37 | 0.008336 | 0.066759 |
| 67 | unknown compound 38 | -0.02077 | 0.0981 |
| 68 | unknown compound 39 | -0.05626 | -0.10789 |
| 69 | unknown compound 40 | -0.07569 | -0.13029 |
| 70 | unknown compound 41 | 0.029875 | -0.1364 |
| 71 | unknown compound 42 | -0.18943 | -0.13871 |
| 72 | unknown compound 43 | -0.09226 | -0.23278 |