Table 2.
Intra- and inter-assay accuracy and precision results of colistin A and colistin B (n = 6).
| Analyte | Quality control sample | Sample concentration (μg/mL) | Intra-dayAccuracy/% | Inter-dayAccuracy/% | Intra-dayprecision RSD/% | Inter-dayprecision RSD/% |
|---|---|---|---|---|---|---|
| Colistin A | LLOQ | 0.10 | 92.96 ± 2.87 | 97.92 ± 4.26 | 3.01 | 7.79 |
| LQC | 0.30 | 114.65 ± 5.82 | 102.33 ± 7.44 | 5.07 | 2.52 | |
| MQC | 2.0 | 92.48 ± 3.25 | 93.57 ± 7.76 | 3.51 | 8.29 | |
| HQC | 7.5 | 107.83 ± 6.65 | 94.00 ± 9.67 | 6.17 | 10.29 | |
| Colistin B | LLOQ | 0.10 | 93.56 ± 4.78 | 99.21 ± 8.41 | 5.10 | 8.48 |
| LQC | 0.30 | 107.36 ± 1.45 | 105.12 ± 4.82 | 1.35 | 5.57 | |
| MQC | 2.0 | 90.97 ± 4.67 | 93.29 ± 8.81 | 5.14 | 10.07 | |
| HQC | 7.5 | 102.86 ± 5.18 | 94.02 ± 7.72 | 5.04 | 8.21 | |