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Related Concept Videos

Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

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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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The homogenate obtained after cell lysis contains various membrane-bound organelles that can be further separated into pure fractions by subcellular fractionation. These isolates are used to study specific cellular components, analyze localized protein activity, and are even employed in diagnostics. Fractionation is typically achieved using centrifugation methods, the most common being density-gradient and differential centrifugation.
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Cellulose and Pectic Polysaccharides01:15

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 Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth.  Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
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Cell separation was first achieved in 1964 by S. H. Seal, who separated large tumor cells from the smaller blood cells using filtration. Two years later, Pohl and Hawk performed experiments on how cells respond differently to a nonuniform electric field based on the cell type. Such observations were the inception of cell separation methods, which allow isolating a single cell type from a heterogeneous sample.
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Ion Exchange01:17

Ion Exchange

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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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Related Experiment Video

Updated: Mar 19, 2026

Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
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Cellulose fractionation with IONCELL-P.

A M Stepan1, A Monshizadeh1, M Hummel1

  • 1Department of Forest Product Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, 00076 Aalto, Finland.

Carbohydrate Polymers
|June 18, 2016
PubMed
Summary

The IONCELL-P process effectively separates cellulose and hemicellulose using ionic liquid-water mixtures. Cellulose molecular weight significantly influences its solubility and the overall fractionation efficiency.

Keywords:
CelluloseFractionationIONCELL-PIonic liquidMolecular weight

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Area of Science:

  • Biomass fractionation
  • Green chemistry

Background:

  • Cellulose and hemicellulose separation is crucial for biorefineries.
  • Ionic liquids offer tunable properties for biomass processing.

Purpose of the Study:

  • To investigate the role of cellulose molecular weight in the IONCELL-P fractionation process.
  • To identify key factors governing cellulose solubility in ionic liquid-water mixtures.

Main Methods:

  • Cotton linters were ozone-treated to achieve varying cellulose molecular weights.
  • Ozone-treated cotton linters were fractionated using 1-ethyl-3-methylimidazolium acetate ([emim][OAc]) and water mixtures.
  • Molar mass distributions of dissolved and undissolved cellulose were analyzed.

Main Results:

  • Cellulose molecular weight was found to be a critical factor in the IONCELL-P fractionation.
  • Solubility of cellulose in [emim][OAc]-water mixtures is strongly dependent on its molar mass.
  • The IONCELL-P process demonstrated effective separation of cellulose fractions based on molecular weight.

Conclusions:

  • Cellulose molecular weight plays a pivotal role in the efficiency of the IONCELL-P fractionation process.
  • Understanding this relationship is key to optimizing biomass fractionation for pure cellulose and hemicellulose recovery.