Ultra Aqueous C18 Columns by Restek Corp.

Manufacturer Restek Corp.
4.5
/
5.0
  |  11 reviews
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 C... Read more


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Ultra Aqueous C18 Columns
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Average Rating: 4.5
11 Scientists have reviewed this product

5 out of 5
Ease of use
4 out of 5
After sales service
4 out of 5
Value for money


  • Status:

    Reviewer
  • Member since: 2020

  • Organization: Shimadzu Scientific Instruments, Inc.



  • Ease of use
    4 out of 5
    After sales service
    4 out of 5
    Value for money
    4 out of 5
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Great.
Rating: 4.0

  • Application Area: Separation of cannabis

"Very satisfactory, very good company and columns."

Review date: 16 Mar 2020 | Ultra Aqueous C18 Columns
  • Status:

    Reviewer

  • Member since: 2018

  • Organization: CRA-W



  • Ease of use
    5 out of 5
    After sales service
    5 out of 5
    Value for money
    5 out of 5
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Saves time and money by using this material
Rating: 5.0

  • Application Area:Analyze pesticides

"Very easy to develop a new method of pesticide analysis with this HPLC column"

Review date: 13 Jul 2018 | Ultra Aqueous C18 Columns
  • Status:

    Reviewer

  • Member since: 2018

  • Organization: Analitek



  • Ease of use
    5 out of 5
    After sales service
    5 out of 5
    Value for money
    4 out of 5
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Great results!
Rating: 4.7

  • Application Area: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 | Ultra Aqueous C18 Columns
  • Status:

    Reviewer

  • Member since: 2018

  • Organization: Exova



  • Ease of use
    5 out of 5
    After sales service
    3 out of 5
    Value for money
    3 out of 5
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Good product with longer life
Rating: 3.7

  • Application Area:Organic acids

"Reproducible results with aqueous eluent. Good column for organic acids."

Review date: 11 Jul 2018 | Ultra Aqueous C18 Columns
  • Status:

    Reviewer

  • Member since: 2013

  • Organization: Kirikkale University



  • Ease of use
    5 out of 5
    After sales service
    5 out of 5
    Value for money
    5 out of 5
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Rating: 5.0

  • Application Area:Separation

"Very easy to use and productive."

Review date: 10 Jul 2013 | Ultra Aqueous C18 Columns
  • Status:

    Reviewer

  • Member since: 2013

  • Organization: University Multispectral Laboratories



  • Ease of use
    5 out of 5
    After sales service
    4 out of 5
    Value for money
    4 out of 5
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Rating: 4.3

  • Application Area: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 | Ultra Aqueous C18 Columns
  • Status:

    Reviewer

  • Member since: 2013

  • Organization: University Multispectral Laboratories



  • Ease of use
    4 out of 5
    After sales service
    4 out of 5
    Value for money
    4 out of 5
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Rating: 4.0

  • Application Area: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 | Ultra Aqueous C18 Columns
  • Status:

    Reviewer

  • Member since: 2013

  • Organization: Shawnee State University



  • Ease of use
    5 out of 5
    After sales service
    5 out of 5
    Value for money
    5 out of 5
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Rating: 5.0

  • Application Area: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 | Ultra Aqueous C18 Columns
  • Status:

    Reviewer

  • Member since: 2009

  • Organization: IMPAX LABORATORIES



  • Ease of use
    5 out of 5
    After sales service
    5 out of 5
    Value for money
    5 out of 5
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Rating: 5.0

  • Application Area:pharmaceutical

"Best retention as tested among different vendors in the catagory of aqueous columns so far."

Review date: 16 Feb 2012 | Ultra Aqueous C18 Columns
  • Status:

    Reviewer

  • Member since: 2010

  • Organization: University of Arizona



  • Ease of use
    4 out of 5
    After sales service
    4 out of 5
    Value for money
    4 out of 5
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Rating: 4.0

  • Application Area:chemistry

"Great columns for use in drug discovery and development. The vendor has a huge catalog that is a bit intimidating, but the selection was perfect for our needs."

Review date: 16 Feb 2012 | Ultra Aqueous C18 Columns


  • Status:

    Reviewer

  • Member since: 2011

  • Organization: Mercer University



  • Ease of use
    5 out of 5
    After sales service
    4 out of 5
    Value for money
    4 out of 5
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Rating: 4.3
"Great separation. Gives good results! Highly recommended."

Review date: 25 May 2011 | 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 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