Development of UV Spectrophotometric Procedures for Determination of Amlodipine and Celecoxib in Formulation: Use of Scaling Factor to Improve the Sensitivity

Figure 3

First derivative spectra of AMD (0.5 μg/ml) and COX (10 μg/ml) with scaling factor 1 (red) and scaling factor 10 (blue). Enlarged part shows the absorbance difference at 252 nm.