Table 2.
The interday and intraday precision and recoveries of the method.
| Analytes | Spiked amount (ng/g) | Intraday (n = 3) | Interday (n = 3) | ||
|---|---|---|---|---|---|
| Recovery (%) | RSD (%) | Recovery (%) | RSD (%) | ||
| Aloe-emodin | 20 | 97.3 | 2.26 | 96.7 | 2.88 |
| 100 | 96.8 | 2.58 | 97.5 | 3.15 | |
| 500 | 95.2 | 2.42 | 94.8 | 3.36 | |
|
| |||||
| Rhein | 20 | 104.3 | 2.03 | 102.8 | 3.28 |
| 100 | 97.5 | 2.83 | 98.1 | 2.95 | |
| 500 | 96.3 | 2.78 | 97.4 | 3.45 | |
|
| |||||
| Emodin | 20 | 105.6 | 2.75 | 106.6 | 3.47 |
| 100 | 96.7 | 2.63 | 95.8 | 4.58 | |
| 500 | 94.9 | 2.86 | 95.4 | 3.48 | |
|
| |||||
| Chrysophanol | 20 | 97.7 | 2.05 | 98.0 | 2.85 |
| 100 | 98.3 | 2.83 | 97.7 | 3.15 | |
| 500 | 95.8 | 2.75 | 96.2 | 3.42 | |
|
| |||||
| Physcion | 20 | 104.6 | 2.46 | 105.6 | 4.03 |
| 100 | 95.8 | 2.94 | 96.3 | 3.85 | |
| 500 | 96.8 | 2.81 | 96.4 | 3.07 | |