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Table 6 Data of the analysis of nicotinamide and tretinoin in the synthetic pharmaceutical preparation with the Proposed Method

From: Development and validation of derivative UV spectroscopic method for simultaneous estimation of nicotinamide and tretinoin in their binary mixtures and pharmaceutical preparations

Ingredient/labeled concentration (w/w%) Nicotinamide (4%) Tretinoin (0.1%)
 Wavelength (nm)/deriv. order  253/D1  245/D2  269/D2  348/D0
Recovery ± RSD %a 101.00 ± 0.90 100.40 ± 1.22 99.30 ± 0.88 93.70 ± 1.39
Recovery ± RSD %b 101.70 ± 1.42 101.16 ± 1.62 98.37 ± 0.90
  1. aIn solution preparation
  2. bIn cream preparation