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Stability of curcumin in plasma under different conditions of storage, temperature, and time intervals (n = 3).
| Sample condition | Curcumin nominal concentration | |||
|---|---|---|---|---|
| 25 ng/mL | 400 ng/mL | |||
| Accuracy (%) | Precision CV (%) | Accuracy (%) | Precision CV (%) | |
| Bench-top (30°C, 4 h) | 91.85 | 8.90 | 105.90 | 12.50 |
| Postprocessing (30°C, 4 h) | 88.45 | 7.50 | 101.56 | 13.40 |
| Freeze-thaw (−20°C, 72 h) | 89.34 | 5.40 | 99.47 | 11.60 |
| Long time (−20°C, 7 d) | 90.77 | 6.20 | 103.24 | 8.90 |
