The Ultra line represents Restek’s broadest selection of stationary phases on a single silica support. Made of high-purity, type B silica that minimizes activity and creates high density bonding, these columns are designed for selective and reliable HPLC applications.

particle size: 3 µm or 5 µm, spherical
pore size: 100 Å
carbon load: 12%
endcap: no
pH range: 2.5 to 8
temperature limit: 80 °C
USP phase code: L68
phase category: polar embedded alkyl
ligand type: proprietary polar functional embedded alkyl
properties:

• Increased retention for acids and water-soluble compounds.
• Compatible with 100% aqueous mobile phases.
• Capable of reversed phase and HILIC separations.