Liquid chromatographic determination and plasma concentration profile of optical isomers of ibuprofen in humans

J Pharm Sci. 1984 Nov;73(11):1542-4. doi: 10.1002/jps.2600731112.


A sensitive and specific high-performance liquid chromatographic assay for the optical isomers of ibuprofen in plasma is reported. The isomers were converted to their diastereoisomeric S(+)-2-octyl esters and were resolved with two silica columns in series and a mobile phase containing 0.05% isopropyl alcohol in heptane. The lower limit of sensitivity was 0.5 micrograms/mL. The plasma concentrations of the optical isomers in a normal volunteer following administration of racemic, S(+)-, and R(-)-ibuprofen are reported. Following administration of R(-)-ibuprofen, there was stereoselective inversion of R(-)- to S(+)-ibuprofen.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Chromatography, High Pressure Liquid / methods
  • Chromatography, Liquid / methods
  • Humans
  • Ibuprofen / blood*
  • Stereoisomerism


  • Ibuprofen