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High proportion of pore/surface area available to large molecules.
Guard column requires Trident LC column protection system or Trident HPLC in-line guard cartridge holder.
Description
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.
The general-purpose Restek C18 is a conventional monomeric octadecylsilane column suitable for analyses of a wide range of compounds from acidic through slightly basic.
Stationary Phase Category: C18, octadecylsilane (L1) Ligand Type: monomeric C18 Particle: 3 µm or 5 µm, spherical Pore Size: 300 Å Carbon Load: 9% End-Cap: yes Surface Area: 100 m2/g pH Range: 2.5 to 8 Maximum Temperature: 80 °C
