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Stationary Phase Category: bare silica (L3)
Ligand Type: none
Particle: 5 µm, spherical
Pore Size: 300 Å
Carbon Load: n/a
Surface Area: 100 m2/g
pH Range: 2.5 to 8
Maximum Temperature: 80 °C
Certificates of analysis for new Restek LC columns are now provided electronically. To view and download, visit www.restek.com/documentation then enter your cat.# and serial #.
Viva columns are based on a wide pore material we designed for optimal large-molecule separations. In developing Viva silica, we found that although many commercial wide-pore silicas meet the standard 300 Å mean pore size, most have very broad distributions about this mean, with a significant portion of their pore volume falling below 150 Å. This means a large portion of the surface area is unavailable to larger molecules. Viva columns have a narrow distribution around the mean pore size, permitting a larger portion of the silica surface to play a role in the separation.