CarbonX:  Engineered Carbon for Analytical, Preparative, and Sample Preparative Separations

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CarbonX Applications

  • Sample preparation – SPE, dSPE, SLE, QuEChERS
  • HPLC
  • Guard Columns

CarbonX Features

Selectivity for polar, hydrophilic analytes. Selectivity for hydrogen bond donors.

    • Behaves like a reverse phase material under reverse phase conditions.
    • Particle sizes:  2, 3, 5, 10, 20, 30-62 Microns
    • Pore Diameters:  3,5, 10, 80, 100, 200, 300 Angstroms
    • Carbon Content: 5,10%

 

Sample Prep CarbonX Options

CarbonX Plus CarbonX BOSCarbonX COSCarbonX COACarbonX COICarbonX COF
Pressure Stability (PSI)100001000010000100001000010000
Pore Diameter (Ang)1008080100095
Particle Diameter30-60 micron30-60 micron30-60 micron30-60 micron50 nm60-100 mesh
Percent Carbon6651055
SubstrateProprietarySilicaSilicaAluminaIronFlorisil

HPLC CarbonX Options

MaterialSubstrateParticle SizePore Diameter% Carbon
COSType B Silica280, 150, 3005,10
COSType B Silica380, 150, 3015,11
COSType B Silica580, 150, 3025,12
BOSType B Silica280, 150, 3005
BOSType B Silica380, 150, 3015
BOSType B Silica580, 150, 3025

Learn More about CarbonX Materials

Necessity is the mother of Invention


United Science started to engineer carbons for separations purposes in response to a general need for different chromatographic selectivity.  Along the way, we found that naturally derived products can generally not stand up to the rigors of analytical work and that the technology has essentially remained in an unadvanced state for decades.  Even more appalling are the costly poor recoveries, poor stability, questionable chemical reproducibility,  and high equipment maintenance that GCB inflicts on its users.    Behold the engineered carbon for the masses.

CarbonX is available in a wide variety of particle sizes and pore diameters.



  1. Reproducible pore and particle diameter that does not change when in use or when shipped.

  2. Particle sizes from monodisperse HPLC style particles to mesh sizes.

  3. Pore diameters available from 5-300 angstroms.

Mechanical Stability is Important Even for Low Pressure Sample Preparation Applications



  1. GCB is notoriously mechanically friable.

  2. Breaks up in shipping and during use.

  3. Breakage changes surface area and collapses porosity.

  4. Streak test qualitatively compares friabilty.

  5. CarbonX is stable to 10,000 psi plus so it won't break up during use.

Sample Prep Materials



  1. Removes pigments, polar matrix components

  2. Weak pi-pi interactions allow for desorption of planar molecules

  3. Applications include QuEChERS and SPE

Sample Prep Materials



  • Lipid Removal

  • Removes pigments, polar matrix components

  • Weak pi-pi interactions allow for desorption of planar molecules

  • Lewis Base alumina sites interact with lewis base portion of fatty aids.

  • Applications include QuEChERS and SPE

  Sample Prep Materials



  • Removes pigments, polar matrix components

  • Weak pi-pi interactions allow for desorption of planar molecules

  • Applications include QuEChERS and SPE

Sample Prep Materials


  • Florisil Substrate

  • Preferred for SPE of chlorinated materials such as PCBs

  • Removes pigments, polar matrix components

  • Weak pi-pi interactions allow for desorption of planar molecules

  • Applications include QuEChERS and SPE

Sample Prep Materials


  • Magnetic carbon sorbent

  • Nonporous; nanoparticles

  • Removes pigments, polar matrix components

  • Weak pi-pi interactions allow for desorption of planar molecules

  • Applications include QuEChERS and SPE

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