Carbon nanoparticle-filled polyacrylonitrile electrospun stationary phase for ultrathin layer chromatography (UTLC)
Carbon materials have been widely used as stationary phase in separation science due to their unique selectivity and stability. The wide variety of potential intermolecular interactions that can occur between carbon surfaces and target analytes makes carbon stationary phases applicable to a wide variety of separation applications. However, the chromatographic efficiency of carbon surface is limited by the fact that they are composed of two different surface active sites for reaction: edge plane sites and basal plane sites. The two sites have different polarity and sorption properties and may interact with analytes differently. Increasing the surface homogeneity of carbon stationary phases may not only increase the chromatographic efficiency but also allows for more selective separations.
Researchers at the Ohio State University, led by Dr. Susan Olesik, have synthesized various carbon nanoparticles and incorporated them within polyacrylonitrile that are electrospun to provide the stationary phase for UTLC. The carbon nanoparticles used include multi-walled carbon nanotubes, edge plane ordered carbon nanorods and amorphous carbon nanorods. The novel UTLC plates incorporating the carbon nanoparticles have demonstrated unique selectivity and enhanced chromatographic efficiency for separation of nonpolar compounds. Key benefits from these nanoparticles include higher selectivity when separating compounds from mixture, increased stability in the ULTC plates and decreased analysis time.
- Environmental technology
- Higher selectivity
- Enhanced efficiency for separation of nonpolar compounds
- Increased stability in ULTC plates