• Plasma vitamin A analysis by liquid chromatography: Probucol interference 

      Shephard G.S.; Hough B.J.; Van Stuijvenberg M.E.; Labadarios D. (1985)
      The analysis of plasma retinol by high-performance liquid chromatography (HPLC) has recently become a widely accepted routine method. Many of the published reports involve reverse phase separations using methanol or ...