The Determination of Theophylline and Cimetidine in Fluid Infusion by UVand Zero-crossing Derivative Spectrophotometry

UV and zero-crossing derivative spectrophotometry has been used to determinemixtures of theopbylline and cimetidino. The samples were determined by UV at 271 1 um fortheophylline and by zero-crossing derivative spectrophotometry fer cimetidine without any