The ALPHA Series represents a high-performance C18, C8, CN, Amino, SCX, and Phenyl phase based on a new type of silica gel developed to show better retention, greater selectivity and high loadability, caused by its exceptionally high surface area.
The bonding density is chosen with respect to optimal selectivity for both hydrophilic and hydrophobic compounds, enabling even the use of 100% aqueous eluents.
The end capping technology minimizes residual silanol group to an amount which is below the detectable level.
Silanol group have negative effects on peak symmetry, particularly in case of basic compounds, and on chemical phase robustness.
Every Alpha column is tested for efficiency and passed only if it shows more than 80,000 plates per meter for toluene.
Alpha Analytical and Preparative columns are available in all standard and specialized dimensions.
Our cutting-edge technology ensures high bonding density with minimal silanol activity.
| Bonding Phase | C18 | C8 | CN | Phenyl | Amino |
|---|---|---|---|---|---|
| Average Particle Size (μm) | 5 & 3 μm | 5 μm | 5 μm | 5 μm | 5 μm |
| Average Pore Size (Å) | 100 | 120 | 120 | 120 | 120 |
| Specific Surface Area (m.sq/g) | 450 | 300 | 287 | 340 | 300 |
| Average Pore Volume (ml/g) | 1.1 | 1.0 | 1.06 | 1.07 | 1.0 |
| Carbon Load (%) | 17 | 10 | 7.1 | 8.3 | 4 |
| pH Range | 1.5-10.5 | 2-8 | 2-8 | 2-8 | 2-8 |
| USP Listing | L1 | L7 | L10 | L11 | L18 |
