Item Amlodipine Besylate Atorvastatin Calcium Linear range (μg/ml) 5.18-15.54 5.26-15.78 Detection limit (μg/ml) 0.16 0.17  Quantitation limit (μg/.ml) 0.48 0.52 Regression data - - No. 5 5 slope (b) 44667 41443     Standard deviation of the slope 115.01 157.99 intercept (a) -405.02 -2251.4 Standard deviation of the intercept 2163.61 2152.91 correlation coefficient® 0.9999 0.9999 Standard error of regression 2407.38 1819.8 (Y=a+bC, where C is the concentration of the compound (μg/ml) and Y is the drug peak area)

Table 2: Calibration data was resulted from method validation of Amlodipine Besylate and Atorvastatin Calcium respectively.