| 摘要 |
The invention relates superficially porous particles, wherein each particle comprises a hollow core, a non-porous inner shell, and a porous outer shell. The hollow core has a radius ranging from 20% to 90% of the radius of the entire particle, the particles have a median size range from about 0.5 μm to 100 μm, with a particle size distribution (one standard deviation) of no more than 15% of the median particle size, the particles have a specific surface area of from 5 to 1000 m2 /g, and the particles comprise a metal oxide selected from silica alumina, titania or zirconia. The particles may constitute a stationary phase in a separation device such as a chromatographic column. Further, a method for making these superficially porous particles is disclosed. |
