Table 4.
Concentration of QC samples, intraday and interday accuracy, and precision
| Accuracy & precision |
Intraday |
Interday |
|||
|---|---|---|---|---|---|
| Analyte | Concentration (ng/ml) | R% | %CV | R% | %CV |
| 24,25(OH)2D3 | 0.5 | 111 | 2.1 | 111 | 2.4 |
| 8 | 101 | 1.9 | 99 | 2.5 | |
| 35 | 101 | 3.1 | 98 | 5.8 | |
| 1,25(OH)2D3 | 0.5 | 102 | 2.7 | 102 | 2.4 |
| 5 | 105 | 0.9 | 107 | 2.4 | |
| 9 | 100 | 1.8 | 103 | 2.9 | |
| 3β-25(OH)D3 | 8 | 97 | 8.1 | 99 | 9.9 |
| 50 | 104 | 1.4 | 102 | 5.0 | |
| 90 | 96 | 6.2 | 100 | 4.9 | |
| 3β-25(OH)D3 QC |
RECIPE level I: 14.9 | 97 | 1.7 | — | — |
| RECIPE level II: 42.0 | 100 | 2.7 | — | — | |
| 3α-25(OH)D3 | 0.5 | 102 | 4.0 | 96 | 6.2 |
| 8 | 99 | 2.3 | 96 | 3.3 | |
| 18 | 100 | 3.3 | 101 | 4.6 | |
| D3 | 8.7 | 95 | 7.3 | 98 | 9.2 |
| 50.7 | 103 | 8.6 | 100 | 9.2 | |
| 90.7 | 102 | 11.3 | 102 | 6.0 | |