Specialty for Structual Isomers / Hydrophobic interaction and planarity selectivity
COSMOSIL Cholester is a new silica based RP column which employs a cholestery bonded phase. Cholester provides enhanced selectivity over traditional C18 materials and greater performance in separating isomers or other closely related compounds. Cholester is ideal for method development and serves as an excellent alternative to traditional C18 columns.
| COSMOSIL Cholester | ||||
|---|---|---|---|---|
| USP code | L101 | |||
| Silica gel | High purity porous spherical silica | |||
| Average particle size | 2.5µm 2.5Cholester | 3µm 3Cholester | 5µm 5Cholester | 15µm 15Cholester |
| Average pore size | approx. 130Å | approx. 120Å | approx. 120Å | approx. 120Å |
| Specific surface area | approx. 330m2/g | approx. 300m2/g | approx. 300m2/g | approx. 300m2/g |
| Stationary phase | Cholesteryl group | |||
| Bonding type | Monomeric | |||
| End capping treatment | Near-perfect treatment | |||
| Carbon content | approx. 21% | - | approx. 20% | approx. 20% |
| pH range | 2 - 7.5 | |||
