Table 3.
The regression equations, LOD, LOQ, and linear range of the 8 analytes.
| Compounds | Regression equations | R 2 | LOD (ng/mL) | LOQ (ng/mL) | Linear range (ng/mL) | Repeatability (RSD, %) | ||
|---|---|---|---|---|---|---|---|---|
| Low concentration | Middle concentration | High concentration | ||||||
| Creatinine | Y = 0.013015 ∗ X + 0.355134 | 0.999 | 0.05 | 0.10 | 39.24–39240 | 4.54 | 3.57 | 5.43 |
| Serotonin | Y = 0.050158 ∗ X − 6.815533 × 10−4 | 0.998 | 1.01 | 2.02 | 4.048–404.8 | 12.21 | 1.58 | 2.42 |
| Adrenaline | Y = 0.004093 ∗ X + 3.553836 × 10−4 | 0.991 | 9.85 | 39.40 | 78.80–3940 | 4.16 | 3.27 | 2.31 |
| Tryptophan | Y = 0.003530 ∗ X − 0.009977 | 0.993 | 0.30 | 1.02 | 421.2–25272 | 1.98 | 1.88 | 2.05 |
| Methionine | Y = 2.488989 × 10−4 ∗ X + 6.677709 × 10−4 | 0.995 | 40.16 | 80.32 | 160.64–8032 | 7.02 | 1.28 | 2.53 |
| Glutamine | Y = 7.373791 × 10−4 ∗ X − 7.910165 × 10−4 | 0.999 | 40.56 | 101.40 | 405.6–40560 | 13.52 | 10.62 | 8.91 |
| Glutamate | Y = 0.003640 ∗ X + 0.003405 | 0.998 | 1.12 | 2.40 | 119.64–2991 | 8.12 | 5.43 | 3.13 |
| Arginine | Y = 0.003604 ∗ X + 4.417252 × 10−5 | 0.992 | 0.15 | 0.50 | 203.8–48912 | 7.47 | 3.34 | 3.28 |