Concentration (μg/mL) | Intra-day | Inter-day | ||||
Measured conc | RSD (%) | RE (%) | Measured conc | RSD (%) | RE (%) | |
0.2 | 0.196 ± 0.010 | 5.10 | −2.00 | 0.186 ± 0.012 | 6.45 | −7.00 |
1 | 1.013 ± 0.029 | 2.86 | 1.30 | 0.953 ± 0.076 | 7.97 | −4.70 |
8 | 8.095 ± 0.288 | 3.56 | 1.19 | 8.269 ± 0.286 | 3.46 | 3.36 |