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  • Title: Improved method for the determination of aspirin and its metabolites in biological fluids by high-performance liquid chromatography: applications to human and animal studies.
    Author: Mays DC, Sharp DE, Beach CA, Kershaw RA, Bianchine JR, Gerber N.
    Journal: J Chromatogr; 1984 Nov 28; 311(2):301-9. PubMed ID: 6520177.
    Abstract:
    An improved method has been developed for the determination of acetylsalicylic acid, salicylic acid, gentisic acid, and salicyluric acid in plasma and urine of rabbits and man. Samples are extracted with dichloromethane containing mephenytoin as an internal standard, the solvent is evaporated under reduced pressure, the residue reconstituted and analyzed by high-performance liquid chromatography. Extraction efficiencies, linearity and assay precision were determined. This method has been applied to human bioavailability studies and the data are presented.
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