%Level Amount of sample taken(μg/ml) Amount of standard drug added(μg/ml) Amount of drug recovered(μg/ml) % Recovery
0% 1 0 98.66 98.66 ± 0.57
50% 1 0.5 1.49 99.2 ± 0.91
100% 1 1 1.97 98.83 ± 1.55
150% 1 1.5 2.49 99.32 ± 1.06
Table 3: Accuracy study of BEN by proposed RP-HPLC method.