Spursil are polar modified phases based on a ultra-high purity silica gel. This unique polar modification maximizes polar retention and selectivity. They also have a high carbon load and can be used in a wide pH range.
| Phase | Particle size / μm | Pore size / Å | Surface area / m²/g | Carbon content / %C | pH range | Endcapping |
| C18 | 3, 5, 10 | 100 | 440 | 25 | 1.5-10 | + |
| C18-EP | 3, 5, 10 | 100 | 440 | 24 | 1.5-10 | + |