Development and Validation of First-Order Derivative Spectrophotometry for Simultaneous Determination of Levocetirizine Dihydrochloride and Phenylephrine Hydrochloride in Pharmaceutical Dosage Form

Table 2

Statistical data of LCT and PHE.

Parameters	LCT at 240 nm	PHE at 283.2 nm
Linear range	4–24 μg/mL	8–48 μg/mL
Slope	0.0152	0.0457
Intercept	0.0045	0.0443
Standard deviation of intercept	0.0008	0.0008
Regression coefficient (𝑟^2)	0.9964	0.9972