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 |