Ultra HPLC Prep Columns

Ultra Aqueous C18 HPLC Prep Columns

The Restek Aqueous C18 is a rugged, reversed-phase column with a well-balanced retention profile. It can effectively retain more types of solutes than a conventional C18 and is ideal for multicomponent LC-MS analyses. The general-purpose Aqueous C18 boasts high reproducibility and compatibility with many mobile phase conditions—even 100% aqueous. And when used with a gradient, it eliminates the all-too-common issue of multiple compounds eluting near the column void time.

• Stationary Phase Category: modified C18 (L1)
• Ligand Type: proprietary polar modified and functionally bonded C18
• Particle: 5µm, spherical
• Pore Size: 100 Å
• Carbon Load: 15%
• End-Cap: no
• Surface Area: 300 m2/g
• pH Range: 2.5 to 8
• Maximum Temperature: 80°C

Ultra IBD HPLC Prep Columns

The Restek IBD is a polar-embedded column that acts as a strong hydrogen bonder and may be the most versatile column available today. With a unique polar group, this column is very retentive and selective for acids. It also provides symmetrical peak shape for strong bases. Restek’s IBD is compatible with 100% aqueous mobile phases and can be used under reversed-phase or HILIC conditions to retain very polar, ionic compounds in highly organic mobile phases.

• Stationary Phase Category: polar-embedded alkyl (L68)
• Ligand Type: proprietary polar functional embedded alkyl
• Particle: 5µm, spherical
• Pore Size: 100 Å
• Carbon Load: 12%
• End-Cap: no
• Surface Area: 300 m2/g
• pH Range: 2.5 to 8
• Maximum Temperature: 80°C

Ultra Biphenyl HPLC Prep Columns

• Stationary Phase Category: phenyl (L11)
• Ligand Type: unique Biphenyl
• Particle: 5µm, spherical
• Pore Size: 100 Å
• Carbon Load: 15%
• End-Cap: yes
• Surface Area: 300 m2/g
• pH Range: 2.5 to 8
• Maximum Temperature: 80°C

Ultra PFP Propyl HPLC Prep Columns

The Restek PFP Propyl is a great choice for the retention and selectivity of charged bases, electronegative compounds, and amine-containing compounds. Unlike a conventional cyano column, the Restek PFP Propyl is much more amenable to LC-MS because it is more reliable and efficient with acidic mobile phases. This versatile column is also compatible with highly aqueous mobile phases and HILIC separations.

• Stationary Phase Category: fluorophenyl propyl (L43)
• Ligand Type: pentafluorophenyl propyl
• Particle: 5µm, spherical
• Pore Size: 100 Å
• Carbon Load: 11%
• End-Cap: yes
• Surface Area: 300 m2/g
• pH Range: 2.5 to 8
• Maximum Temperature: 80°C

Ultra C18 HPLC Prep Columns

The general-purpose Restek C18 is a conventional monomeric octadecylsilane column suitable for analyses of a wide range of compounds from acidic through slightly basic.

• Stationary Phase Category: C18, octadecylsilane (L1)
• Ligand Type: monomeric C18
• Particle: 5µm, spherical
• Pore Size: 100 Å
• Carbon Load: 20%
• End-Cap: yes
• Surface Area: 300 m2/g
• pH Range: 2.5 to 8
• Maximum Temperature: 80°C

Ultra C8 HPLC Prep Columns

Our C8 is a conventional monomeric octylsilane column offering a shorter alkyl chain to provide less hydrophobic retention and improved basic peak shape over a traditional C18 phase. Like our C18, this general-purpose Restek C8 is suitable for a wide range of compounds from acidic through slightly basic.

• Stationary Phase Category: C8, octylsilane (L7)
• Ligand Type: monomeric C8
• Particle: 5µm, spherical
• Pore Size: 100 Å
• Carbon Load: 12%
• End-Cap: yes
• Surface Area: 300 m2/g
• pH Range: 2.5 to 8
• Maximum Temperature: 80°C

Ultra Cyano HPLC Prep Columns

The Restek Cyano is a traditional monomeric cyanopropylsilane that is recommended for assays where alternate selectivity, or confirmation, to a C18 or C8 column is desired. It can be used in normal-phase, reversed-phase (best with mobile phase pH between 5 and 7), and HILIC modes. It is an excellent choice for the analysis of protonated bases.

• Stationary Phase Category: cyano (L10)
• Ligand Type: cyanopropylsilane
• Particle: 5µm, spherical
• Pore Size: 100 Å
• Carbon Load: 8%
• End-Cap: yes
• Surface Area: 300 m2/g
• pH Range: 2.5 to 8
• Maximum Temperature: 80°C

Ultra Silica HPLC Prep Columns

Base-deactivated spherical silica is useful for normal-phase or HILIC separations.

• Stationary Phase Category: bare silica (L3)
• Ligand Type: none
• Particle: 5µm, spherical
• Pore Size: 100 Å
• Carbon Load: n/a
• End-Cap: n/a
• Surface Area: 300 m2/g
• pH Range: 2.5 to 8
• Maximum Temperature: 80°C