Table 1: Analytical parameters.

EPIHPC

𝜆 m a x  nm405402
Beer’s law limit (μg mL−1)2.00–22.0020.00–120.00
Molar absorptivity (L mol−1 cm−1)0.51 × 1040.10 × 104
Sandell’s sensitivity (μg cm−2)0.0270.134
Regression equation* 𝑌 = 𝑎 + 𝑏 𝑋 𝑌 = 𝑎 + 𝑏 𝑋
Slope ( 𝑏 )0.03360.0064
Intercept ( 𝑎 )0.0220.018
Correlation coefficient ( 𝑟 )0.99100.9979
Limit of Detection** (μg mL−1)1.5005.150
Limit of Quantitation** (μg mL−1)4.54515.620

* 𝑌 is the absorbance and 𝑋 is the concentration in μg mL−1.
** Calculated using ICH guidelines.