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Related Concept Videos

Silica Gel Column Chromatography: Overview01:10

Silica Gel Column Chromatography: Overview

Silica gel column chromatography is a technique for separating compounds using a column packed with silica gel as the stationary phase. This method relies on differences in the polarity of compounds. Based on their polarities, compounds move between the stationary phase (silica gel) and the mobile phase (the solvent), forming discrete bands in the column.
Polar components tend to bind strongly to the silica gel, causing them to move slowly through the column. In contrast, nonpolar compounds...
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:
Optimizing Chromatographic Separations01:15

Optimizing Chromatographic Separations

Optimizing chromatographic separations is crucial for obtaining clean separations in a minimum amount of time. Optimization is required for several factors, including kinetic effects related to band broadening, plate height, capacity factor, and separation factor.
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...
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...
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...
Types Of Column Chromatography01:29

Types Of Column Chromatography

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.
Gel Filtration Chromatography
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Updated: May 29, 2026

Curtain Flow Column: Optimization of Efficiency and Sensitivity
06:44

Curtain Flow Column: Optimization of Efficiency and Sensitivity

Published on: June 12, 2016

High efficiency, high temperature separations on silica based monolithic columns.

Magnus Rogeberg1, Steven Ray Wilson, Helle Malerod

  • 1Department of Chemistry, University of Oslo, Oslo, Norway. magnus.rogeberg@kjemi.uio.no

Journal of Chromatography. A
|September 9, 2011
PubMed
Summary
This summary is machine-generated.

Optimizing temperature and flow rate in reversed-phase monolithic columns significantly enhances high-speed peptide separations. Elevated temperatures (80°C) and flow rates (2000 nL/min) boosted protein identification by 70% compared to conventional methods.

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Simple In-House Ultra-High Performance Capillary Column Manufacturing with the FlashPack Approach
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Last Updated: May 29, 2026

Curtain Flow Column: Optimization of Efficiency and Sensitivity
06:44

Curtain Flow Column: Optimization of Efficiency and Sensitivity

Published on: June 12, 2016

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

Area of Science:

  • Analytical Chemistry
  • Chromatography
  • Mass Spectrometry

Background:

  • Reversed-phase monolithic columns offer advantages for fast separations.
  • Optimizing chromatographic conditions is crucial for efficient peptide analysis.
  • High-speed separations are desirable for complex biological samples.

Purpose of the Study:

  • To investigate the effect of temperature on reversed-phase monolithic column performance.
  • To determine optimal conditions for high-speed peptide separations.
  • To evaluate column performance using peak capacity and peak capacity per time unit.

Main Methods:

  • Utilized a nano-LC pumping system for gradient separation of tryptic peptides.
  • Employed reversed-phase monolithic columns of varying lengths (20-100 cm).
  • Investigated flow rates (250-2000 nL/min) and temperatures (20-120°C).

Main Results:

  • Temperature significantly impacted fast separation efficiency.
  • Optimal conditions (2000 nL/min, 80°C) yielded the highest peak capacity per time unit.
  • Achieved 70% more protein identifications versus conventional packed columns.

Conclusions:

  • High temperatures and flow rates enhance speed and efficiency in monolithic column chromatography.
  • Optimized conditions enable faster proteomic analyses with increased identification rates.
  • Monolithic columns are suitable for high-speed, high-efficiency separations in proteomics.