Table 2: Analytical parameters.

Method AMethod B

(nm)601662
Beer’s law limit (μg mL−1)50.00–250.0020.00–100.00
Molar absorptivity (Lmol−1 cm−1)0.92 × 1030.257 × 104
Sandell’s sensitivity (μg cm−2)0.0500.158
Limit of detection** (μg mL−1)1.6500.6626
Limit of quantification** (μg mL−1)5.00002.0080
Regression equation*
Slope ( )0.00200.0049
Intercept ( )0.01240.0203
Correlation coefficient ( )0.99880.9988

* is the absorbance and the concentration in g mL−1.
**Calculated according to ICH guidelines.