Table 5. Stability of EXE and GEN under Different Storage and Handling Conditions.
| sample name | actual concentration of sample (μg/mL) | % recovery |
||
|---|---|---|---|---|
| sshort-term stability (12 h) | long-term stability (−30 °C for 3 weeks) | freeze–thaw cycle | ||
| EXE | 15 | 93.6 | 101.6 | 98.3 |
| 15 | 100.5 | 101.9 | 101.2 | |
| 15 | 97.8 | 99.8 | 97.9 | |
| 25 | 97.5 | 99.9 | 98.7 | |
| 25 | 95.4 | 98.8 | 103.9 | |
| 25 | 102.8 | 99.9 | 97.8 | |
| 35 | 98.6 | 107.8 | 99.8 | |
| 35 | 104.5 | 104.6 | 106.4 | |
| 35 | 92.4 | 99.8 | 104.6 | |
| GEN | 15 | 94.9 | 97.7 | 101.2 |
| 15 | 96.8 | 93.9 | 99.5 | |
| 15 | 91.9 | 98.9 | 98.1 | |
| 25 | 98.2 | 99.9 | 94.3 | |
| 25 | 103.1 | 104.9 | 91.8 | |
| 25 | 101.6 | 99.9 | 101.9 | |
| 35 | 98.0 | 99.8 | 100.8 | |
| 35 | 102.4 | 103.9 | 99.9 | |
| 35 | 98.8 | 106.6 | 103.8 | |