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

Table 4

Results of recovery study of Doxofylline.

Concentration level	Standard: amount added in sample solution in 𝜇g/mL	Amount recovered in 𝜇g/mL	% recovery
80%	80	79.72	99.65
80%	80	79.69	99.62
80%	80	79.98	99.97
100%	100	99.78	99.78
100%	100	99.60	99.60
100%	100	100.28	100.28
120%	120	119.25	99.37
120%	120	119.94	99.95
120%	120	120.11	100.09

Note: sample concentration was used 100 𝜇g/mL.