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

Linearity range (μg/mL)

2-20

1-14

1-14

Limit of detection, LOD, (μg/mL)

0.20

0.13

0.20

Limit of quantification, LOQ, (μg/mL)

0.60

0.40

0.59

Correlation coefficient (r)

0.9998

0.9999

0.9999

Slope

0.050

0.059

0.063

Intercept

0.044

0.005

0.011

S.D. of residuals, S_y/x

5.04 ×10^-3

3.00 × 10^-3

5.63 ×10^-3

S.D. of intercept, S_a

2.99 × 10^-3

2.36 × 10^-3

3.76 ×10^-3

S.D. of slope, S_b

3.00 × 10^-4

2.75 × 10^-4

4.71 × 10^-4

Percentage relative standered deviation, % RSD

1.08

0.96

0.99

Percentage error, % Error

0.41

0.34

0.40

Molar absorptivity, ε L.moL¹.cm-¹

9.3 × 10³

1.43 ×10⁴

1.55 × 10⁴