Table 3.
Regression equation, LOD and LOQ of the six dianthrones
| No. | Compounds | Regression equation | R2 | Range (ng/mL) | LOD (ng/mL) | LOQ (ng/mL) |
|---|---|---|---|---|---|---|
| 1 | Polygonumnolide C4 | Y = 10.186x + 0.0079 | 0.9980 | 2.1–126.0 | 0.4 | 1.1 |
| 2 | Polygonumnolide C3 | Y = 15.446x + 0.0163 | 0.9990 | 2.1–128.4 | 0.4 | 1.1 |
| 3 | Polygonumnolide C1 | Y = 17.122x + 0.0534 | 0.9985 | 2.8–169.8 | 0.3 | 1.1 |
| 4 | Polygonumnolide C2 | Y = 20.117x + 0.0466 | 0.9983 | 2.8–168.0 | 0.3 | 1.1 |
| 5 | trans-Emodindianthrones | Y = 30.352x + 0.0800 | 0.9965 | 3.2–191.0 | 0.3 | 0.7 |
| 6 | cis-Emodin dianthrones | Y = 33.308x + 0.0426 | 0.9978 | 2.8–168.2 | 0.3 | 0.7 |