Spectrophotometric Simultaneous Determination of Salbutamol Sulfate and Ketotifen Fumarate in Combined Tablet Dosage Form by First-Order Derivative Spectroscopy Method

Table 1

Recovery data for the proposed method.

Drug	Conc. of sample taken (µg/mL)	Conc. of pure API spiked (µg/mL)	Total conc. (µg/mL)	Mean total conc. found (𝑛=3) (µg/mL)	%Recovery mean (𝑛=3)	%RSD^a
SAL	20	16	36	36.26	100.73	0.48
	20	20	40	39.86	99.65	0.73
	20	24	44	44.02	100.04	0.11
KTF	10	8	18	18.06	100.33	1.29
	10	10	20	20.24	101.21	0.69
	10	12	22	21.90	99.58	1.26

a% relative standard deviation.