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Stability of VPA, 2-ene VPA and 4-ene VPA in human plasma under different storage conditions.
| Analytes | Concentration (μg/mL) | Long-term |
Post-preparation |
Freeze–thaw |
Bench-top |
||||
|---|---|---|---|---|---|---|---|---|---|
| RE (%) | RSD (%) | RE (%) | RSD (%) | RE (%) | RSD (%) | RE (%) | RSD (%) | ||
| VPA | 30 | 4.2 | 5.5 | 3.8 | 9.8 | 6.2 | 8.7 | 3.9 | 9.9 |
| 100 | 3.8 | 0.9 | 2.6 | 7.0 | 3.2 | 4.1 | 7.6 | 8.8 | |
| 2-ene VPA | 1.5 | 2.3 | 8.0 | 2.4 | 9.4 | 4.3 | 8.8 | 5.3 | 10.0 |
| 5.0 | 1.6 | 7.6 | 5.4 | 5.6 | 4.8 | 9.0 | 5.8 | 11.0 | |
| 4-ene VPA | 0.03 | 4.6 | 4.3 | 4.3 | 7.0 | 8.9 | 7.8 | 6.0 | 10.9 |
| 0.1 | 3.7 | 5.1 | 6.7 | 8.0 | 6.9 | 9.9 | 7.3 | 8.4 | |
