Ultra Aqueous C18 Columns
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.The Ultra Aqueous C18 HPLC column provides reproducible retention times and can be used with highly aqueous mobile phases, which may eliminate the need for sample…
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Great reproducibility
Fungi and Mushroom Analysis
Great effective column for fungi separations. I’ve used for all kinds of fungi.
Review Date: 23 Apr 2023 | Restek Corp.
Great.
Separation of cannabis
Very satisfactory, very good company and columns.
Review Date: 16 Mar 2020 | Restek Corp.
Saves time and money by using this material
Analyze pesticides
Very easy to develop a new method of pesticide analysis with this HPLC column
Review Date: 13 Jul 2018 | Restek Corp.
Great results!
vitamins by hplc
Customers to whom we have sold the Ultra C18 column and who have already used it have seen excellent results. A good, economical alternative.
Review Date: 11 Jul 2018 | Restek Corp.
Good product with longer life
Organic acids
Reproducible results with aqueous eluent. Good column for organic acids.
Review Date: 11 Jul 2018 | Restek Corp.
Separation
Very easy to use and productive.
Review Date: 10 Jul 2013 | Restek Corp.
Food Analysis
Good reproducibility and peak shape. I switched from an instrument manufacturer's columns to Restek with no degradation in performance. I would definitely recommend in the future.
Review Date: 28 May 2013 | Restek Corp.
Environmental analysis
We use these now in our laboratory, instead of another product from the same manufacturer as our HPLC. They work great, no problems with reproducibility or peak shape.
Review Date: 28 May 2013 | Restek Corp.
undergraduate research
The columns were excellent for separating the components in solutions such as whisky's and craft beers. The resolution was great and the reproducibility was consistent.
Review Date: 18 Mar 2013 | Restek Corp.
pharmaceutical
Best retention as tested among different vendors in the catagory of aqueous columns so far.
Review Date: 16 Feb 2012 | Restek Corp.
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.
The Ultra Aqueous C18 HPLC column provides reproducible retention times and can be used with highly aqueous mobile phases, which may eliminate the need for sample derivitization or ion pairing reagents. This column features a true C18 alkyl bonded phase, meeting the requirements of a US Pharmacopoeia (USP) L1 stationary phase.
The Ultra Aqueous C18 column uses a novel bonding chemistry that results in polar groups at the silica surface. These surface polar groups keep the alkyl stationary phase extended, and thus wetted by the mobile phase—even when using up to 100% aqueous mobile phases.
Additionally, although the Ultra Aqueous C18 column behaves similarly to a traditional base-deactivated C18 column when analyzing neutral hydrophobic compounds, it has enhanced retention and unique selectivity for polar and basic compounds.
Ultra Aqueous C18 Columns Features:
- Analyzes polar compounds by reversed phase.
- Retains compounds such as amino acids and water soluble vitamins using simple mobile phases and without derivitization.
- Analyzes polar, hydrophillic materials without retention time loss. Stable retention in 100% aqueous mobile phases.
- Can analyze compounds that are sparingly soluble in organic solvents.
- True C18 alkyl bonded phase.
- High-density C18 ligand coverage.
- Similar selectivity as traditional C18 phases for neutral hydrophobic compounds.
- Unique secondary polar characteristics.
- End-capping diminishes peak tailing observed from exposed silanol sites on the silica surface.
Column Characteristics:
- Phase: C18
- particle Size: 3, 5 μm
- Pore Size: 100 Å
- Length: 30, 50, 100, 150, 200, 250 mm
- ID: 0.3, 1.0, 2.1, 3.0, 3.2, 4.6 mm
