Table 3: Robustness study of Gatifloxacin.

Parameters Levels Retention time (min.) Mean ± SD (n = 3) % RSD
Flow rate (ml/min.) 1.3 2.533 ± 0.031 1.24
1.6 2.481 ± 0.002 0.10
  pH 6.3 2.502 ± 0.003 0.14
6.7 2.509 ± 0.004 0.16
Concentration of sodium benzoate 2.6 2.530 ± 0.003 0.14
2.8 2.500 ± 0.003 0.12
3.2 2.455 ± 0.001 0.06