| Concentration levels (µg/mL) | Concentration added (µg/mL) | RSD (%) | RE (%) Accuracy | |
Intra-day | Inter-day | ||||
Paracetamol | Low QC | 200 | 0.2 | 1.5 | 0.8 |
Middle QC | 250 | 0.1 | 1.3 | 0.7 | |
High QC | 300 | 0.1 | 1.8 | 1.1 |