Ion-pair high-performance liquid chromatographic separation of two thyroxine glucuronides formed by rat liver microsomes

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A simple reversed-phase ion-pair high-performance liquid chromatographic separation method has been developed for thyroxine (T4) and its glucuronide metabolites formed by liver microsomes of untreated and 3-methylcholanthrene-treated rats. Besides the phenol-T4-glucuronide, another, probably acyl-T4-glucuronide, formation has been detected. The effect of pH and temperature on the stability of the acyl-T4-glucuronide was also investigated. The lowering of pH to 2 and cooling the samples to 5°C is necessary to prevent the hydrolysis of acylglucuronide, while both pH and temperature do not affect the stability of the phenol-T4-glucuronide. The retention times of T4 and phenol-T4-glucuronide are highly influenced by the pH of the mobile phase, but not that of acyl-T4-glucuronide.

Original languageEnglish
Pages (from-to)385-389
Number of pages5
JournalJournal of Chromatography B: Biomedical Applications
Issue number2
Publication statusPublished - Jun 7 1996



  • thyroxine
  • thyroxine glucuronides

ASJC Scopus subject areas

  • Chemistry(all)

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