Table 1 PCA results for urine aliquots spiked or not with pseudo-markers peptides at increasing concentrations
Pseudo-markers | Concentration (fmol/μl) | PC1 | PC2 | PC3 | m/z Rank |
|---|---|---|---|---|---|
Low level | |||||
PC (%) | 33.8 | 17.7 | 14.8 | - | |
1672.83 | 20 | 0.31 | 0.22 | 0.04 | 4 |
1046.46 | 30 | 0.31 | 0.21 | 0.08 | 2 |
2465.08 | 25 | 0.27 | 0.20 | 0.05 | 9 |
Medium level | |||||
PC (%) | 31.1 | 26.0 | 15.7 | - | |
1672.83 | 40 | 0.19 | 0.15 | 0.24 | 2 |
1046.46 | 60 | 0.13 | 0.13 | 0.30 | 3 |
2465.08 | 50 | 0.24 | 0.15 | 0.15 | 4 |
High level | |||||
PC (%) | 38.6 | 18.3 | 10.3 | - | |
1672.83 | 80 | 0.14 | 0.19 | 0.24 | 1 |
1046.46 | 120 | 0.15 | 0.20 | 0.14 | 2 |
2465.08 | 100 | 0.10 | 0.16 | 0.07 | 3 |