Table 2 Analytical performance data of the proposed method.

Linearity range (µM)

1.0–30.0

6.0–200.0

10.0–200.0

5.0–100.0

Limit of detection, LOD (µM)

0.31

0.57

1.76

0.75

Limit of quantitation, LOQ (µM)

0.93

1.74

5.32

2.28

Slope (b)

15.89

2.67

2.24

2.67

Intercept (a)

55.89

2.84

32.81

47.47

Correlation coefficient (r)

0.9999

0.9999

0.9999

0.9999

S.D. of the residuals, S_y/x

2.45

1.63

1.78

1.33

S.D. of the intercept, S_a

1.48

0.46

1.19

0.61

S.D. of the slope, S_b

0.095

0.0098

0.0106

0.0157

Percentage relative standard deviation, % RSD

1.95

1.14

1.97

1.60

Percentage relative error, % Error

0.80

0.47

0.69

0.60