Dual Wavelength Spectrophotometric Method for Simultaneous Estimation of Atorvastatin Calcium and Felodipine from Tablet Dosage Form

Table 2

Absorptivity values for ATR and FEL.

Concentration (μg/mL)	Absorptivity of FEL		Concentration (μg/mL)	Absorptivity of ATR
	268 nm	245 nm		268 nm	245 nm
2	0.00603	0.001399	20	0.08533	0.0254
4	0.00618	0.00148	40	0.08539	0.0266
6	0.00638	0.001462	60	0.08548	0.0282
8	0.00654	0.001495	80	0.08562	0.0299
10	0.00673	0.001516	100	0.08586	0.0331
12	0.00698	0.001543	—	—	—
Mean	0.00759	0.001465	Mean	0.08553	0.0286
S.D.	0.44	1.03	S.D.	1.39	0.95