Table 5. PNT Stability data and dilution integrity in RLMs matrix under different conditions.
| Nominal Concentration(ng.mL−1) | Mean (ngmL−1) | Recovery % | Precision (CV %) | Accuracy (RE %) |
|---|---|---|---|---|
| Room Temp. for 8h | ||||
| 20 | 19.86 | 99.30 | 1.48 | -0.67 |
| 150 | 148.26 | 98.84 | 1.36 | -1.16 |
| 300 | 298.25 | 99.42 | 0.96 | -0.58 |
| Three freeze-thaw cycles | ||||
| 20 | 19.47 | 97.35 | 0.55 | -2.63 |
| 150 | 147.25 | 98.17 | 0.63 | -1.82 |
| 300 | 299.95 | 99.98 | 1.11 | -0.02 |
| Stored at 4 o C for 24 h | ||||
| 20 | 20.34 | 101.70 | 2.07 | 1.68 |
| 150 | 146.98 | 97.99 | 1.19 | -2.00 |
| 300 | 299.37 | 99.79 | 0.72 | -0.21 |
| Stored at -20 o C for 30 days | ||||
| 20 | 20.20 | 101.00 | 2.07 | 0.97 |
| 150 | 148.99 | 99.33 | 1.48 | -0.67 |
| 300 | 298.70 | 99.57 | 1.21 | -0.43 |
| Dilution integrity | ||||
| 180 | 177.77 | 98.76 | 1.54 | -1.24 |
| 360 | 360.85 | 100.24 | 0.50 | 0.24 |