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Biomedical chromatography : BMC

Stereoselective determination of p-hydroxyphenyl-phenylhydantoin enantiomers in rat liver microsomal incubates by reversed-phase high-performance liquid chromatography using beta-cyclodextrin as chiral mobile phase additives.


PMID 11268054

Abstract

An analytical method was developed for determination of p-hydroxyphenylphenylhydantoin enantiomers in rat liver microsome by using reversed-phase high-performance liquid chromatography. A 50 mm C(8) column was used as the analytical column. The mobile phase was made up of 8.8 mmol/L beta-cyclodextrin, 0.25 mol/L urea and 0.05 mol/L ammonium acetate in water. The assay was linear from 2.05 to 410.0 micromol/L for each enantiomer. The limits of detection and of quantitation for the method were 0.90 and 2.05 micromol/L for each enantiomer, respectively. The analytical method afforded average recoveries of 93.59 +/- 2.75% and 94.72 +/- 1.78% for S- and R-p-hydroxyphenylphenylhydantoin, respectively. The method allowed study of the in vitro glucuronidation of p-hydroxyphenylphenylhydantoin in rat liver microsomal incubates. The stereoselectivity of p-hydroxyphenylphenylhydantoin phase II metabolism was observed.

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