Table 2: Results of recovery studies by standard addition method.

Method Amount taken
μg mL−1 a
Amount added
μg mL−1
Total amount foundb   
μg mL−1]
Mean ± S.D.c
Recovery % RSD %

Method A25125.247 ± 1.14100.991.23
100100200.187 ± 1.58100.190.93
200300.132 ± 2.58100.070.96

Method B25125.14 ± 1.34100.561.49
100100200.36 ± 1.87100.361.02
250351.49 ± 2.56100.600.84

Method C50150.24 ± 1.14100.480.79
100200303.01 ± 1.58101.510.76
400504.36 ± 3.87101.090.81

Rasalas tablet [1 mg].
bFive independent analyses.
cStandard deviation.