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Related Concept Videos

Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

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...
Size-Exclusion Chromatography01:08

Size-Exclusion Chromatography

In size-exclusion chromatography (SEC), also known as molecular-exclusion or gel-permeation chromatography, molecules are separated based on their sizes. This technique is important for separating large molecules such as polymers and biomolecules. The two classes of micron-sized stationary phases encountered in SEC are silica particles and cross-linked polymer resin beads. Both materials are porous, but their pore sizes vary significantly.
Silica particles offer advantages such as rigidity,...
Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
High-Performance Liquid Chromatography: Introduction01:11

High-Performance Liquid Chromatography: Introduction

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.
In HPLC, two phases play a critical role in the separation process:
Gas Chromatography: Types of Columns and Stationary Phases01:17

Gas Chromatography: Types of Columns and Stationary Phases

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.
For an analyte to remain on the column for a sufficient amount of time, it must exhibit some level of compatibility (or...
Principles Of Column Chromatography01:13

Principles Of Column Chromatography

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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Updated: Jun 16, 2026

Simple In-House Ultra-High Performance Capillary Column Manufacturing with the FlashPack Approach
13:36

Simple In-House Ultra-High Performance Capillary Column Manufacturing with the FlashPack Approach

Published on: December 4, 2021

Efficient separation of small molecules using a large surface area hypercrosslinked monolithic polymer capillary

Jiri Urban, Frantisek Svec, Jean M J Fréchet

    Analytical Chemistry
    |February 10, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Hypercrosslinked monolithic capillary columns offer enhanced surface area for separating small molecules like uracil and alkylbenzenes. However, their mesoporous structure hinders protein separation.

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    Published on: September 20, 2016

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    Improved Polymerase Chain Reaction-restriction Fragment Length Polymorphism Genotyping of Toxic Pufferfish by Liquid Chromatography/Mass Spectrometry
    09:34

    Improved Polymerase Chain Reaction-restriction Fragment Length Polymorphism Genotyping of Toxic Pufferfish by Liquid Chromatography/Mass Spectrometry

    Published on: September 20, 2016

    Area of Science:

    • Chromatography
    • Materials Science
    • Polymer Chemistry

    Background:

    • Development of monolithic capillary columns using poly(styrene-co-vinylbenzyl chloride-co-divinylbenzene).
    • Hypercrosslinking process to create a porous monolith structure.

    Discussion:

    • The hypercrosslinked monolithic column shows a significantly increased surface area (663 m²/g) compared to the precursor.
    • Mesopores within the monolith enable effective separation of uracil and alkylbenzenes in isocratic mode.
    • The column demonstrates utility in size exclusion chromatography.

    Key Insights:

    • High column efficiency of 73,000 plates/m achieved for uracil separation.
    • Mesoporous structure is beneficial for small molecule separations but detrimental for protein separation.
    • Hypercrosslinked monolithic columns offer a versatile platform for specific chromatographic applications.

    Outlook:

    • Further optimization of monolithic column design for improved protein separation.
    • Exploration of applications in other analytical separation techniques.
    • Investigating the impact of pore size distribution on chromatographic performance.