| | QC level | Accuracy of PB1/PB1-I | Accuracy of PB2/PB3 | | Low (%) | Medium 1 (%) | Medium 2 (%) | High (%) | Low (%) | Medium 1 (%) | Medium 2 (%) | High (%) |
| | QC sample, room temp, 4 h | 100.3 | 96.1 | 90.8 | 97.6 | 90.5 | 97.2 | 88.6 | 95.0 | | QC sample, 4°C, 24 h | 104.8 | 107.8 | 111.2 | 106.9 | 107.6 | 108.4 | 109.0 | 103.4 | | Auto sampler, 4°C, 24 h | 106.8 | 104.6 | 101.0 | 98.9 | 110.4 | 105.3 | 112.0 | 105.9 | | Freeze–thaw, −20°C, 3 times | 88.8 | 85.7 | 87.4 | 88.6 | 96.8 | 91.0 | 92.3 | 92.3 | | Freeze–thaw, −80°C, 3 times | 106.5 | 90.9 | 97.1 | 101.4 | 105.4 | 101.1 | 96.2 | 103.3 | | QC sample, −20°C, 37 days | 113.9 | 104.3 | 105.0 | 113.1 | 103.6 | 96.8 | 99.3 | 104.6 | | QC sample, −80°C, 94 days | 102.5 | 105.0 | 105.4 | 107.3 | 109.2 | 106.2 | 104.7 | 105.2 | | Working solution, −20°C, 18 days | 110.2 | 105.0 | 105.6 | 110.6 | 95.8 | 101.3 | 99.7 | 101.5 | | Working solution, −80°C, 94 days | 91.6 | 96.3 | 103.3 | 99.3 | 98.5 | 95.2 | 101.0 | 96.9 | | Store solution, −80°C, 94 days | 92.8 | 98.5 | 97.3 | 95.1 | 92.9 | 95.9 | 96.5 | 96.3 |
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