Development and Validation of High Performance Liquid Chromatography Method for Simultaneous Estimation of Ambroxol and Doxofylline in Their Combined Tablet Dosage Form

Table 6

Robustness data for Ambroxol.

Factors	% RSD	Tailing factor (𝐴𝑆)	Efficiency (theoretical plates)	Resolution
pH of mobile phase
pH 4.3	1.1935	1.455	6903	14.724
pH 4.7	0.7549	1.348	7318	14.810
Flow rate
0.8 mL/min	0.7022	1.375	7090	14.736
1.2 mL/min	0.7072	1.429	7109	14.745
Solvent %
−2%	1.0015	1.348	6890	14.698
+2%	1.1029	1.455	6851	14.672