standard deviation -> 0.28%
Robustness
The robustness was studied by analyzing the same samples of Carbamazepine by deliberate variation in the method parameters. The change in the responses was noted. Robustness of the method was studied by change in flow rate ± 0.2 ml/min. composition of mobile phase by ± 5 % of organic solvent, change in pH by ± 0.2 unit and column oven temperature by ± 2°C. The parameters used in system suitability test were asymmetry of the chromatographic peak, peak resolution, theoretical plates and capacity factor, as RSD of peak area for replicate injections.