... decreases, retention in normal-phase chromatography241 HPLC for Pharmaceutical Scientists, Edited by Yuri Kazakevich and Rosario LoBruttoCopyright © 2007 by John Wiley & Sons, Inc.Carbohydrates ... zirconia for normal phase chromatography, J. Chromatogr. A691 (19 95), 205–212.22. U. Trüdinger, G. Müller, and K. K. Unger, Porous zirconia and titania as packingmaterials for high-performance ... REFERENCES 2595NORMAL-PHASE HPLC Yong Liu and Anant Vailaya5.1 INTRODUCTIONHigh-performance liquid chromatography (HPLC) is a separation tool parexcellence for the analysis of compounds...