Research Article

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

Table 5

Result of intraday precision.

Day 1Label claim (mg/tablet)Amount added (%)Total amount added (mg)Concentration recovered* (mean ± SD)% recovery estimated* (mean ± %SD)

MorningATR 108088.04 ± 0.30100.22 ± 1.12
1001010.10 ± 0.3497.10 ± 0.57
1201212.13 ± 0.44102.79 ± 1.52
FEL 108088.27 ± 1.47101.80 ± 1.74
1001010.56 ± 1.78101.32 ± 1.04
1201212.90 ± 1.2899.99 ± 0.91

EveningATR 108088.08 ± 1.18101.64 ± 1.17
1001010.04 ± 1.55101.40 ± 1.87
1201212.05 ± 0.28101.55 ± 1.13
FEL 108088.11 ± 1.54101.28 ± 0.45
1001010.14 ± 1.1799.68 ± 0.56
1201212.99 ± 1.9899.46 ± 0.98

*Indicates ± SD ().