Table 1.
The TC values of the eight peaks in PCA. The absolute value standing for the scattering degree to a certain PC is indicated with “-” standing for the direction. The sum of absolute values of peaks shows the significance of difference. Therefore, the rank of eight peaks was 4212 (TC=47.33), 1866 (TC=28.79), 2212 (TC=23.02), 2661(TC=19.9), 4284 (TC=17.88), 2863 (TC=14.67), 5909 (TC=6.41), and 5341 (TC=6.1). SC: single contribution, SC= loading value ×contribution of PC×100, (PC1=52%, PC2=15%, PC3=12%); TC: the sum of absolute value from SC.
| m/z | 1866 | SC | 2212 | SC | 2661 | SC | 2863 | SC | 4212 | SC | 4284 | SC | 5341 | SC | 5909 | SC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Loading 1 | 0.23 | 11.96 | 0.25 | 13 | 0.22 | 11.44 | 0.24 | 12.48 | −0.8 | −4.16 | 0.24 | 12.48 | 0.01 | 0.52 | −0.02 | −1.04 |
| Loading 2 | −0.53 | −7.95 | 0.38 | 5.7 | −0.34 | −5.1 | 0.09 | 1.35 | 0.11 | 1.65 | 0.32 | 4.8 | −0.26 | −3.9 | −0.19 | −2.85 |
| Loading 3 | −0.74 | −8.88 | −0.36 | −4.32 | 0.28 | 3.36 | −0.07 | −0.84 | −0.34 | −4.08 | −0.05 | −0.6 | −0.14 | −1.68 | 0.21 | 2.52 |
| TC | 28.79 | 23.02 | 19.9 | 14.67 | 47.33 | 17.88 | 6.1 | 6.41 |