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

Table 4

Precision data at 240 nm for LCT.

Conc.; (μg/mL)	Intraday; Mean ± S.D. (𝑛=3)	% RSD	Interday; Mean ± S.D. (𝑛=3)	% RSD
12	0.229±0.001	0.66	0.228±0.002	1.10
16	0.287±0.001	0.53	0.287±0.002	0.87
20	0.353±0.002	0.56	0.355±0.003	0.98