Table 1 Spectral parameters and statistical data of the regression equation

λ max (nm)

424

842

Beer’s law limits (μg mL⁻¹)

0.50–18.50

2.00–50.00

Molar absorptivity (L mol⁻¹ cm⁻¹)

0.7829 × 10⁵

0.9033 × 10⁴

Sandell sensitivity (μg cm⁻²)

0.4807 × 10⁻²

4.1666 × 10⁻²

Limit of detection (μg mL⁻¹)^a

0.1579

0.3721

Limit of quantification (μg mL⁻¹)^a

0.4787

1.1278

Regression equation^b

Y = a + bX

Y = a + bX

Intercept (a)

0.0531

0.0112

Slope (b)

0.0564

0.0133

Correlation coefficient (r)

0.9985

0.9992