High performance liquid chromatography (HPLC) is one of the most useful and popular separation techniques. Stationary phases or column packings are key factors in promoting the development of HPLC. Zirconia is very suitable for HPLC as an alternative to silica due to its excellent chemical stability, mechanical stability and thermal stability. There are large numbers of Lewis sites on zirconia surface. It is easy to get a useful stationary phase by modified zirconia with Lewis bases (L-base), which had been...