Figure 1From: Derivative spectrophotometric analysis of benzophenone (as an impurity) in phenytoinA: Zeroth derivative spectra of 1 μg/mL benzophenone (--) and 200 μg/mL phenytoin (......) in methanol. B: Zeroth derivative spectra of 1 μg/mL benzophenone (--) and 5 μg/mL phenytoin (......) in methanol.Back to article page