Table 2.
Stability of HPLC assay for determining triptolide in plasma samples.
| Nominal concentration (ng/mL) | RSD (%, n=5) |
||
|---|---|---|---|
| Freeze–thaw | At 4 °C, 12 h | At −20 °C, 3 weeks | |
| 25 | 6.2 | 6.9 | 9.2 |
| 100 | 4.7 | 7.5 | 8.3 |
| 500 | 5.6 | 5.8 | 6.5 |
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