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Related Concept Videos

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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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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High-Performance Liquid Chromatography: Introduction01:11

High-Performance Liquid Chromatography: Introduction

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High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
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Gas Chromatography: Types of Columns and Stationary Phases01:17

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Gas chromatography (GC) relies on stationary phases to separate and analyze components in a sample. There are two main types of stationary phases: liquid and solid. Liquid stationary phases are non-volatile, thermally stable, and chemically inert liquids coated onto the column. Solid stationary phases are particles of adsorbent material, such as silica gel or molecular sieves.
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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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High-Performance Liquid Chromatography: Elution Process01:05

High-Performance Liquid Chromatography: Elution Process

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In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...
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Updated: Oct 30, 2025

Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides
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[A polymer resin surface polymerization-based hydroxide-selective anion exchange stationary phase].

Zhanqiang Yang1, Zongying Li1, Dehui Yang2

  • 1School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China.

Se Pu = Chinese Journal of Chromatography
|July 2, 2021
PubMed
Summary

A novel hydroxide-selective anion exchange stationary phase was developed using polystyrene-divinylbenzene microspheres. This P@A-M phase demonstrates excellent separation performance and stability for anion determination, including in tea samples.

Keywords:
allyl glycidyl etherion chromatography (IC)pendant vinyl groupstationary phasesurface polymerization

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Area of Science:

  • Analytical Chemistry
  • Materials Science

Context:

  • Development of specialized stationary phases for chromatography is crucial for accurate analyte separation.
  • Existing anion exchange phases may have limitations in selectivity or stability for specific applications.

Purpose:

  • To synthesize and characterize a novel hydroxide-selective anion exchange stationary phase based on polystyrene-divinylbenzene (PS-DVB) microspheres.
  • To evaluate the separation performance and stability of the developed phase, termed P@A-M.
  • To demonstrate the practical application of the P@A-M phase in determining inorganic anions in real-world samples like tea.

Summary:

  • A new stationary phase, P@A-M, was created by surface polymerization of allyl glycidyl ether (AGE) onto PS-DVB microspheres, followed by epoxy ring-opening with alkylol amines.
  • Characterization confirmed successful introduction of quaternary amine groups without altering resin properties.
  • The P@A-M phase exhibited high hydroxide selectivity, good separation performance (resolution > 1.5), and excellent running stability (RSD < 1.13%).

Impact:

  • Provides a highly selective and stable stationary phase for anion exchange chromatography.
  • Enables accurate determination of inorganic anions in complex matrices such as beverages.
  • Contributes to advancements in chromatographic method development for environmental and food analysis.