ANALYTICAL LETTERS, cilt.31, sa.15, ss.2663-2678, 1998 (SCI-Expanded)
In this study, two different spectrophotometric methods (Vierordt and Absorbance ratio method) were applied for Cocaine HCl - Procaine HCl and Cocaine HCl-Caffeine in synthetic binary mixtures. The result of the spectrophotometric methods were then compared to the results obtained from an HPLC method.