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| Stability | Quality Control | Average | SD | % CV | Accuracy (%) | Inaccuracy (%) |
|---|---|---|---|---|---|---|
| After 24 h | QCL (70 ng/mL) | 64.02 | 2.5 | 3.9 | 91.46 | 8.54 |
| QCM (800 ng/mL) | 745 | 37.30 | 5.01 | 93.14 | 6.86 | |
| QCH (1500 ng/mL) | 1500 | 75.83 | 5.06 | 100.08 | 0.08 |
QCL: quality control low; QCM: quality control medium; QCH: quality control high; SD: standard deviation; CV: coefficient of variation
