Table 3. Precision of injection, within-day stability, repeatability of sample preparation of the serum analytical method in negative ion mode (n = 5).
| m/z_tR | Precision of injection | Within-day stability | Repeatability of sample prepartion | |||
| tR(RSD%) | Intensity (RSD%) | tR(RSD%) | Intensity (RSD%) | tR(RSD%) | Intensity (RSD%) | |
| 215.1043_1.0 | 3.7 | 11.2 | 2.6 | 9.5 | 1.4 | 5.2 |
| 203.2172_4.2 | 0.6 | 4.3 | 0.9 | 6.5 | 1.2 | 3.4 |
| 201.1363_7.1 | 1.5 | 7.6 | 2.1 | 4.6 | 3.1 | 2.5 |
| 581.1004_9.2 | 2.6 | 5.4 | 1.8 | 3.7 | 2.4 | 2.9 |
| 408.213_11.4 | 1.2 | 6.9 | 0.5 | 2.8 | 2.3 | 3.6 |
| 564.4331_14.9 | 0.6 | 8.1 | 0.9 | 1.9 | 1.4 | 7.5 |
| 851.1042_20.7 | 0.5 | 9.6 | 1.2 | 4.1 | 3.4 | 8.6 |