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  • Title: High-performance liquid chromatographic method for the determination of salicylic acid and its metabolites in urine by direct injection.
    Author: Mallikaarjun S, Wood JH, Karnes HT.
    Journal: J Chromatogr; 1989 Aug 25; 493(1):93-104. PubMed ID: 2778025.
    Abstract:
    A direct injection method has been developed for the determination of salicylic acid and its metabolites in urine. Urine samples are treated with hydroxylamine to convert salicyl acyl glucuronide to salicylhydroxamic acid, which can be accurately quantitated by direct injection into a high-performance liquid chromatographic system along with salicylic acid, gentisic acid and salicyluric acid. Salicyl phenolic glucuronide is quantitated by difference after hydrochloric acid hydrolysis at 65 degrees C with no loss of salicylic acid by sublimation or hydrolytic loss of salicyluric acid. This method has been applied to urine samples from human subjects and the results are discussed.
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