Research Article

Method Development for Simultaneously Determining Indomethacin and Nicotinamide in New Combination in Oral Dosage Formulations and Co-Amorphous Systems Using Three UV Spectrophotometric Techniques

Figure 5

The second-order derivative spectra of (1) indomethacin 20 μg/mL (blue), (2) nicotinamide spectrum 20 μg/mL (red), and (3) their mixture 10 + 10 μg/mL (black). Scaling factor ×40.