Restek / Ultra
Ultra
The Ultra™ line represents Restek’s broadest selection of stationary phases on a single silica support. Made of high-purity, spherical silica, that minimizes activity and creates high-density bonding, these columns are designed for selective and reliable HPLC applications.
Ultra™ Quat and Carbamate are application specific HPLC columns for the analysis of quaternary amines and carbamates, respectively.
| Phase-Name | Modification | Particle Size | Pore Size | End-capping | C-Content | USP | Surface | pH-Range | Tmax |
| Ultra™ C18 | C18 | 3, 5 µm | 100 Å | + | 20% | L1 | 300 m2/g | 2.5‒8.0 | 80 °C |
| Ultra™ Aqueous C18 | C18 | 3, 5 µm | 100 Å | - | 15% | L1 | 300 m2/g | 2.5‒8.0 | 80 °C |
| Ultra™ C8 | C8 | 3, 5 µm | 100 Å | + | 12% | L7 | 300 m2/g | 2.5‒8.0 | 80 °C |
| Ultra™ C4 | C4 | 3, 5 µm | 100 Å | + | 9% | L26 | 300 m2/g | 2.5‒8.0 | 80 °C |
| Ultra™ C1 | C1 | 3, 5 µm | 100 Å | + | 5% | L13 | 300 m2/g | 2.5‒8.0 | 80 °C |
| Ultra™ Biphenyl | Biphenyl | 3, 5 µm | 100 Å | + | 15% | L11 | 300 m2/g | 2.5‒8.0 | 80 °C |
| Ultra™ Aromax | Phenyl | 3, 5 µm | 100 Å | + | 17% | L11 | 300 m2/g | 2.5‒8.0 | 80 °C |
| Ultra™ Cyano | Cyanopropyl | 3, 5 µm | 100 Å | + | 8% | L10 | 300 m2/g | 2.5‒8.0 | 80 °C |
| Ultra™ Amino | Aminopropyl | 3, 5 µm | 100 Å | - | 2% | L8 | 300 m2/g | 2.5‒8.0 | 80 °C |
| Ultra™ PFP Propyl | Pentafluorophenylpropyl | 3, 5 µm | 100 Å | + | 11% | L43 | 300 m2/g | 2.5‒8.0 | 80 °C |
| Ultra™ IBD | Polar embedded Alkyl | 3, 5 µm | 100 Å | - | 12% | L68 | 300 m2/g | 2.5‒8.0 | 80 °C |
| Ultra™ Carbamate | N/A | 3, 5 µm | 100 Å | N/A | N/A | N/A | 300 m2/g | 2.5‒8.0 | 80 °C |
| Ultra™ Quat | N/A | 3, 5 µm | 100 Å | N/A | N/A | N/A | 300 m2/g | 2.5‒8.0 | 80 °C |
| Ultra™ Silica | - | 3, 5 µm | 100 Å | - | - | L3 | 300 m2/g | 2.5‒8.0 | 80 °C |