Skip to main content

Table 7 The precision of the multiwavelength regression method

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

AML (µg/mL)

% LC

AVS (µg/mL)

% LC

Actual

Found

Claim

Found

Repeatability (n = 6)

5.02

5.00

99.60

20.10

20.29

100.97

4.94

4.89

98.99

19.74

19.71

99.85

5.11

5.10

99.80

20.43

20.55

100.59

5.01

4.98

99.40

20.02

20.30

101.40

4.83

4.82

99.79

19.31

19.31

100.00

4.94

4.42

98.44

17.97

17.98

100.06

Mean

99.34

Mean

100.47

RSD%

0.55

RSD%

0.61

Intermediate precision (n = 6)

5.00

5.04

100.80

20.00

20.30

101.55

5.00

4.98

99.50

20.00

20.38

101.90

5.00

5.04

100.84

20.00

19.97

99.90

4.99

4.94

98.92

19.96

20.18

101.10

5.00

5.03

100.60

19.97

19.94

98.85

5.00

4.93

98.68

20.00

20.36

101.85

Mean

99.87

Mean

101.03

RSD%

0.98

RSD%

0.94