Skip to main content

Table 5 Multiwavelength regression method recovery results

From: Simple spectrophotometric methods for the determination of amlodipine and atorvastatin in bulk and tablets

Mixture no.

Regression equation

Y = bx + a

Amlodipine (µg/mL)

% Content

Atorvastatin (µg/mL)

% Content

Theoretical

Actual

Theoretical

Actual

1

0.5987b + 0.5881

(r = 0.9999)

13.01

12.94

99.46

6.49

6.36

98.00

2

0.7960b + 0.8059

(r = 0.9998)

17.33

17.21

99.31

8.65

8.72

100.81

3

0.9807b + 0.9904

(r = 0.9998)

21.60

20.77

98.15

10.82

10.72

99.08

4

0.5915b + 0.7944

(r = 0.9999)

13.00

12.78

98.31

8.65

8.60

99.42

5

0.7920b + 0.5932

(r = 0.9997)

17.30

17.12

98.96

6.49

6.42

98.92

6

0.5944b + 0.3943

(r = 0.9998)

13.00

12.84

98.77

4.33

4.27

98.61

Analytical standard

21.62 (µg/mL)

10.82 (µg/mL)

Mean

98.83

99.14

RSD (%)

0.53

0.96