Packing Material | 15C18-MS-II | 15C18-AR-II | 15C18-PAQ |
---|---|---|---|
Silica Gel | High Purity Porous Spherical Silica | ||
Average Particle Size | 15 µm | ||
Average Pore Size | approx. 120Å | ||
Specific Surface Area | approx. 300 m2/g | ||
Stationary Phase | Octadecyl Group | ||
Bonding Type | Monomeric | Polymeric | |
Main Interaction | Hydrophobic Interaction | ||
End Capping Treatment | Near-perfect Treatment | ||
Carbon Content | approx. 16% | approx. 17% | approx. 11% |
pH Range | 2-10* | 1.5-7.5* | 2-7.5 |
Feature | This phase is recommended for most of applications but particularly effective for basic organic compounds. | This phase is recommended for the separations requiring acidic mobile phase conditions. It also shows superior molecular shape selectivity to monomeric type C18columns. | This phase is designed to offer superior retention of polar compounds and excellent reproducibility in highly aqueous mobile phases, even in 100% aqueous. |
* Optimum pH range of columns based on silica gel is between 2 and 7.5.
Carbazole is extracted from anthracene oil (coal tar) and required high purity because it is often used for analytical applications. Following is the preparative separation of carbazol using a 50 mm I.D. COSMOSIL 15C18-AR-II.
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