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: 15%
endcap: fully endcapped
pH range: 2.5 to 8
temperature limit: 80 °C
USP phase: L11
phase category: phenyl
ligand type: unique Biphenyl
properties:

• Increased retention for dipolar, unsaturated, or conjugated solutes.
• Enhanced selectivity when used with methanolic mobile phase.
• Ideal for increasing sensitivity and selectivity in LC-MS analyses.