Table 2.
Linear regression data, LOD and LOQ of the nine triterpenoids in P. guajava.
| Analytes | Retention Time (min) | Calibration Curve a | Test Range (ug/mL) | R2 | LOD b (μg/mL) | LOQ c (μg/mL) |
|---|---|---|---|---|---|---|
| 1 | 21.95 | y = 1.39x + 4.46 | 3.03–48.40 | 0.9993 | 3.34 | 11.12 |
| 2 | 34.47 | y = 1.52x + 4.76 | 3.43–54.80 | 0.9992 | 2.99 | 9.96 |
| 3 | 35.82 | y = 1.50x + 4.60 | 7.75–124 | 0.9993 | 2.95 | 9.84 |
| 4 | 39.18 | y = 8,165.82x -0.51 | 0.28–2.25 | 1.0000 | 0.30 | 1.01 |
| 5 | 41.48 | y = 10,232.97x − 5.44 | 0.52–8.25 | 0.9998 | 0.25 | 0.85 |
| 6 | 45.75 | y = 13,596.12x − 3.55 | 0.47–7.50 | 0.9998 | 0.18 | 0.61 |
| 7 | 48.30 | y = 14,543.73x – 11.33 | 0.54–8.63 | 0.9999 | 0.23 | 0.77 |
| 8 | 52.49 | y = 1.57x + 4.24 | 7.38–1.18 | 0.9993 | 10.85 | 36.15 |
| 9 | 54.27 | y = 1.59x + 4.44 | 4.75–76.0 | 0.9992 | 9.76 | 32.53 |
a y, peak area; x, concentration of the analytes (ug/mL); b Limit of detection (S/N = 3); c Limit of quantification (S/N = 10).