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In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and...
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Chromatography is a technique used to separate compounds based on differences of partitioning between two phases, the stationary phase and the mobile phase.
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Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
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Affinity chromatography is a powerful technique extensively utilized for separating and purifying specific biomolecules from complex mixtures. It capitalizes on the highly selective binding between an analyte and its counterpart, such as antibody-antigen interactions. The counterpart is immobilized on the stationary phase, forming an affinity column. The stationary phase typically consists of solid support, such as agarose or porous glass beads, immobilizing the affinity ligand. The mobile...
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The chromatography technique was first invented in 1901 by Michael S. Tswett, a Russian botanist, to separate plant pigments using organic solvents. Further, in 1941, Archer John Porter Martin and R. L. M. Synge modified the technique by packing silica gel into a column. A mixture of amino acids was then separated on the packed column using chloroform and water mixture as the mobile phase. This was the first report on column chromatography. At present, column chromatography is a widely used...
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The stability and compatibility of column material with samples are crucial for efficient purification in chromatographic techniques. Various operating parameters such as pH, temperature, or solvent affect the packing of the column material, thereby determining the purification efficiency. The choice of column material also plays an essential role in deciding the operating parameters and can be modified based on the proteins that need to be purified.
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Diamond based adsorbents and their application in chromatography.

Anton A Peristyy1, Olga N Fedyanina2, Brett Paull1

  • 1Australian Centre for Research on Separation Science (ACROSS), School of Physical Sciences, University of Tasmania, Hobart 7001, Australia.

Journal of Chromatography. A
|July 8, 2014
PubMed
Summary

Diamond materials show promise for chromatography due to their stability and adsorption properties. This review covers diamond-based stationary phases, their performance, and applications in various chromatography modes.

Keywords:
AdsorbentsChromatographyCompositesDetonation nanodiamondDiamond

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Separation Science

Background:

  • Diamond and diamond-based materials have gained interest in separation sciences over the last decade.
  • Unique properties include chemical inertness, mechanical, thermal, and hydrolytic stability, excellent thermal conductivity, and minimal thermal expansion.

Purpose of the Study:

  • To review recent research on the preparation of diamond and diamond-based stationary phases.
  • To summarize their properties and chromatographic performance.
  • To highlight retention mechanisms and applicability in various chromatography modes.

Main Methods:

  • Literature review of recent research on diamond-based stationary phases.
  • Analysis of material properties relevant to chromatography.
  • Evaluation of chromatographic performance and retention mechanisms.

Main Results:

  • Diamond's properties make it a promising material for diverse chromatographic applications.
  • Various diamond and diamond-based stationary phases have been developed.
  • Specific retention mechanisms have been identified for different diamond-containing phases.

Conclusions:

  • Diamond-based materials offer significant potential for advancing separation science.
  • Further research can optimize diamond phases for specific chromatographic challenges, including high-temperature and high-pressure applications.