Storage conditions | Concentration (ng/mL) | Accuracy ± SD (%) | RSD (%) |
---|---|---|---|
Ambient temperature for 24 h | 15 | 92.22 ± 6.02 | 6.53 |
400 | 99.24 ± 4.32 | 4.35 | |
800 | 108.98 ± 3.63 | 3.33 | |
At -20 °C for 60 days | 15 | 104.21 ± 7.62 | 7.31 |
400 | 102.35 ± 6.54 | 6.39 | |
800 | 110.02 ± 3.84 | 3.49 | |
At 4 °C in the autosampler for 24 h | 15 | 106.26 ± 5.43 | 5.11 |
400 | 108.49 ± 1.98 | 1.83 | |
800 | 99.63 ± 7.67 | 7.70 | |
3 Freeze-thaw cycles | 15 | 93.02 ± 3.78 | 4.06 |
400 | 97.85 ± 5.30 | 5.42 | |
800 | 101.73 ± 6.87 | 6.75 |