Table 1 Analytical performance data for OLZ and DZP determination using the suggested method

Concentration range (µM)

5.0–200.0

1.0–100.0

LOD (µM)

0.68

0.29

LOQ (µM)

2.07

0.89

Regression equation

(F₀ − F) = 0.62C + 11.70

(F₀ − F) = 1.41C + 44.95

Correlation coefficient (r)

0.9995

0.9998

S.D. of the intercept (S_a)

0.13

0.12

S.D. of the slope (S_b)

0.001

0.002

S.D. of the residuals (S_y/x)

0.20

0.19

Percentage relative standard deviation (% RSD)

1.669

1.022

Percentage relative error (% error)

0.62

0.42