Table 2 Analytical performance of the suggested first derivative synchronous method

Wavelength difference (Δ λ)

 = 40 nm

Linear range (μg/mL)

0.5–5.0

0.02–0.5

Intercept (a)

− 1.082

0.190

Slope (b)

10.147

59.477

Correlation coefficient (r)

0.9998

0.9999

Residuals S.D (S_y/x)

0.408

0.131

Intercept S.D (S_a)

0.318

0.074

Slope S.D (S_b)

0.105

0.326

Percentage relative standard deviation (% RSD)

1.269

1.403

Percentage relative error (% Error)

0.518

0.575

Limit of detection, LOD (μg/mL)

0.103

0.004

Limit of quantitation, LOQ (μg/mL)

0.313

0.012

Number of experiments (n)

6

6