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Reference Standards
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Exempted Drug of Abuse Reference Standards
Viva Silica 5µm Columns (USP L3)
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 300Å mean pore size, most have very broad distributions about this mean, with a significant portion of their pore volume falling below 150Å. This means a large portion of the surface area is unavailable to larger molecules. Viva columns have a narrow distribution about the mean pore size, permitting a larger portion of the silica surface to play a role in the separation.
- Excellent for separating peptides or proteins.
- Rugged, spherical particles, with 300Å pore size.
- High proportion of pore/surface area available to large molecules.
Highly base-deactivated wide pore packing that exhibits excellent peak shape for a wide range of compounds in normal phase separations.
particle size: 5µm, spherical
pore size: 300Å
pH range: 2.5 to 7.5
temperature limit: 80°C
