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Ion Exchange

Ion Exchange

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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Updated: Apr 23, 2026

Hydrophobic Salt-modified Nafion for Enzyme Immobilization and Stabilization

Hydrophobic Salt-modified Nafion for Enzyme Immobilization and Stabilization

Published on: July 11, 2012

Ordered mesoporous carbon/Nafion as a versatile and selective solid-phase microextraction coating.

Jingbin Zeng¹, Cuiying Zhao¹, Jingjing Chen¹

¹State key laboratory of heavy oil processing & College of Science, China University of Petroleum (East China), Qingdao 266555, China.

Journal of Chromatography. A

|September 25, 2014

Summary

This summary is machine-generated.

Ordered mesoporous carbon (OMC) coatings demonstrate superior extraction efficiency for diverse analytes compared to carbon nanotubes. This novel material shows promise for advanced solid-phase microextraction techniques.

Keywords:

Coating Nafion Ordered mesoporous carbon Solid-phase microextraction

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Last Updated: Apr 23, 2026

Hydrophobic Salt-modified Nafion for Enzyme Immobilization and Stabilization

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Published on: July 11, 2012

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

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Published on: August 16, 2018

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices

Published on: March 27, 2019

Area of Science:

Materials Science
Analytical Chemistry
Nanotechnology

Background:

Solid-phase microextraction (SPME) is a widely used technique for sample preparation.
Developing novel extraction materials with enhanced efficiency and selectivity is crucial for analytical chemistry.
Ordered mesoporous carbon (OMC) materials offer unique structural properties beneficial for adsorption and separation.

Purpose of the Study:

To synthesize ordered mesoporous carbon (OMC) with specific structural characteristics.
To develop and evaluate an OMC/Nafion coating for solid-phase microextraction (SPME).
To compare the extraction performance of the OMC/Nafion coating with a multi-walled carbon nanotubes/Nafion coating.

Main Methods:

Synthesis of OMC using a hard-templating method with silica MSU-H and sucrose.
Immobilization of OMC onto stainless steel wire using Nafion binder to create SPME coatings.
Extraction of various non-polar and polar analytes using the developed OMC/Nafion coating.
Electrochemical analysis to demonstrate the feasibility of electrochemically enhanced SPME.

Main Results:

The synthesized OMC exhibited a high surface area (1019 m²/g), uniform mesoporous structure (4.2 nm pore size), and large pore volume (1.46 cm³/g).
The OMC/Nafion coating demonstrated significantly higher extraction efficiency for all tested analytes compared to a multi-walled carbon nanotubes/Nafion coating.
The OMC/Nafion coating showed excellent extraction selectivity for aromatic non-polar compounds.
The feasibility of using the OMC/Nafion coating in electrochemically enhanced SPME was successfully demonstrated.

Conclusions:

The OMC/Nafion coating is a highly efficient and selective material for SPME applications.
The unique properties of OMC, including high surface area and ordered mesoporosity, contribute to its superior performance.
This novel coating holds potential for various analytical applications, including electrochemically enhanced SPME.