• Journal of Pharmaceutical Investigation
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• v.12 no.4
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• pp.126-131
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• 1982

A quantitative fluorometric method was developed to determine aspirin and salicylic acid in bulk aspirin and commercial aspirin tablets. The excitation maximum for aspirin was observed at 280 nm and the emission maximum was at 335nm. The lowest energy excitation band for salicylic acid was at 308nm and the fluorescence emission band was at 450nm. Excipients, binders, lubricants and impurities did not interfere. Excellent recoveries were obtained for aspirin and salicylic acid. Results obtained by the KP III procedure and the proposed method were compared.