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Direct Spectrophotometric Determination of Salicylic Acid, Acetylsalicylic Acid, Salicylamide, Caffeine, and Phenacetin in Tablets or Powders

Food ChemistryPharmaceutical ScienceAcetylsalicylic AcidBiochemistryActive IngredientMedicineSalicylic AcidGas ChromatographyDirect Spectrophotometric DeterminationAnalytical ChemistryLiquid ChromatographyClinical ChemistryChromatographic AnalysisPharmacologyChromatographyDrug Analysis