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Related Concept Videos

Chromatographic Methods: Terminology01:18

Chromatographic Methods: Terminology

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Chromatography is an analytical technique widely used in fields such as chemistry, biology, environmental science, and pharmaceuticals to separate the components of a mixture and identify substances between them. The process of chromatography is based on the interactions between two distinct phases: the stationary phase and the mobile phase. The stationary phase is fixed in place by a supporting material, while the mobile phase moves over it, carrying the solutes. As the mobile phase travels,...
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Chromatographic Methods: Classification01:12

Chromatographic Methods: Classification

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Chromatographic techniques are classified in three ways: the classification is based on the physical state of the stationary and mobile phases, how the mobile phase and the stationary phase contact each other, or through the chemical or physical processes that isolate the components of the sample. Typically, the mobile phase is either a liquid or gas, while the stationary phase is either a solid or a liquid layer applied to a solid surface.
Chromatographic techniques are typically named by...
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Chromatography: Introduction01:10

Chromatography: Introduction

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Chromatography is a technique used to separate compounds based on differences of partitioning between two phases, the stationary phase and the mobile phase.
The phase in which the compounds linger or on which the compounds adsorb is called the stationary phase, whereas the mobile phase is the solvent that carries the solutes to be analyzed. In traditional column chromatography, the mixture flows through the stationary phase, and the compounds partition between the stationary and mobile phases...
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Principles Of Column Chromatography01:13

Principles Of Column Chromatography

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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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Chromatographic Resolution01:15

Chromatographic Resolution

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In chromatography, a solute moves through a chromatographic column and tends to spread, forming a Gaussian-shaped band. The longer the solute spends in the column, the broader the band becomes. The broadening can lead to overlaps within the column, affecting separation effectiveness.
The effectiveness of separation can be evaluated by determining the level of separation between two neighboring peaks in a chromatogram, which represents the individual components of a sample.
In chromatography,...
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Silica Gel Column Chromatography: Overview01:10

Silica Gel Column Chromatography: Overview

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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...
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Chromatographic Fingerprinting by Template Matching for Data Collected by Comprehensive Two-Dimensional Gas Chromatography
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Fritting techniques in chromatography.

Won Jo Cheong1

  • 1Department of Chemistry, Inha University, Namku, Incheon, South Korea.

Journal of Separation Science
|February 11, 2014
PubMed
Summary
This summary is machine-generated.

This review covers the long history and various techniques of frits used in packed columns. It discusses methods like in situ fritting, fritless techniques, and provides insights into choosing the right frit for different applications.

Keywords:
FritlessFritsMonolithsSintersSol-gel

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Area of Science:

  • Analytical Chemistry
  • Chromatography
  • Separation Science

Background:

  • Frits have a long history of use in packed columns for chromatography.
  • Despite their importance, dedicated review articles on frits are notably absent.
  • This review addresses the need for a comprehensive overview of frit technologies.

Purpose of the Study:

  • To provide a comprehensive review of frit technologies and related studies.
  • To cover both separate and in situ permanent frits.
  • To discuss the selection criteria and future trends in frit applications.

Main Methods:

  • Review of existing literature on frit applications in packed columns.
  • Categorization and discussion of various fritting techniques.
  • Analysis of frit-related studies and patents.

Main Results:

  • Detailed introduction and discussion of in situ fritting methods (organic monoliths, sol-gel, sintering).
  • Exploration of fritless techniques (tapered tip, capillary restrictors).
  • Overview of miscellaneous fritting techniques (magnetically trapped, single particle frits).

Conclusions:

  • Frits are essential components in packed column chromatography.
  • A variety of fritting techniques exist, each with specific advantages.
  • Guidance is provided on selecting appropriate fritting methods for diverse analytical needs.