Table 3 Optimized conditions in proposed method

Absorption wavelength (nm)

520.0

Beer’s law range (μg/mL)

40.00–140.00

Limit of detection (μg/mL)

1.52

Limit of quantification (μg/mL)

4.60

Correlation coefficient (r²)

0.999

Slope (m)

0.005

Intercept (c)

− 0.004

Regression equation

y = 0.005x − 0.004

Molar Absorptivity (L mole⁻¹cm⁻¹)

0.023 × 10⁵

Sandell’s sensitivity (μg/cm²)

0.182