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Table 2 Analysis results of ET and TC in the validation set using multivariate calibration methods (PLS, PCR, and ILS)

From: Design, optimization, and validation of chemometrics-assisted spectrophotometric methods for simultaneous determination of etodolac and thiocolchicoside in pharmaceuticals

Sample no.

Added concentration (μg/mL)

Found concentration (μg/mL)

PLS

PCR

ILS

ET

TC

ET

TC

ET

TC

ET

TC

1

45

1.0

47.07

1.03

47.15

0.98

47.67

0.98

2

60

2.5

59.05

2.63

58.95

2.52

58.37

2.47

3

30

2.5

30.85

2.46

31.39

2.47

30.53

2.44

4

75

5.0

75.88

5.15

75.72

4.98

77.98

5.15

5

15

5.0

15.49

5.10

14.85

4.97

15.28

5.15

6

60

7.5

61.25

7.52

59.80

7.85

60.83

7.87

7

30

7.5

31.46

8.00

30.55

7.77

31.54

7.66

8

45

10.0

44.81

9.80

44.22

9.97

46.98

9.67