Theoretical concentration (mg/l) Calculated concentration (mg/l) % Recovery
2.0 2.4 118
5.0 6.0 120
20.0 20.0 100
30.0 31.8 106
Table 1: Accuracy and recovery values for concentrations: 2; 5; 20 and 30 mg/l of hydroxyurea standards based in enriched plasma.