Table 1 Analytical performance data for the determination of the studied drugs by the proposed methods

Linearity range (µg/mL)

8–90

20–100

20–200

5–40

10–100

10–120

Intercept (a)

0.006

−0.028

−0.036

1.3 × 10⁴

4.926 × 10⁵

−7.217 × 10⁴

Slope (b)

0.001

0.002

0.002

4.2399 × 10⁴

3.1 × 10⁴

9.343 × 10⁴

Correlation coefficient (r)

0.9999

0.9999

0.9999

0.9999

0.9998

0.9999

S.D. of residuals (S_y/x)

5.061 × 10⁻⁴

1.146 × 10⁻³

1.169 × 10⁻³

5.015 × 10³

1.912 × 10⁴

6.67 × 10⁴

S.D. of intercept (S_a)

3.371 × 10⁻⁴

1.16 × 10⁻³

1.143 × 10⁻³

3.21 × 10³

1.377 × 10⁴

4.908 × 10⁴

S.D. of slope (S_b)

6.828 × 10⁻⁶

1.794 × 10⁻⁵

9.583 × 10⁻⁶

1.667 × 10²

2.723 × 10²

7.00 × 10²

S.D.

0.94

1.51

1.28

0.44

1.49

1.10

% RSD^a

0.95

1.53

1.29

0.44

1.49

1.10

% Error^b

0.39

0.86

0.53

0.18

0.61

0.45

LOD (µg/mL)^c

1.10

1.90

1.90

0.25

1.47

1.70

LOQ (µg/mL)^d

3.40

5.80

5.50

0.76

4.40

5.25