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Related Concept Videos

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...
High-Performance Liquid Chromatography: Introduction01:11

High-Performance Liquid Chromatography: Introduction

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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.
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High-Performance Liquid Chromatography: Elution Process01:05

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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...
High-Performance Liquid Chromatography: Instrumentation00:57

High-Performance Liquid Chromatography: Instrumentation

High-performance liquid chromatography, or HPLC, is an analytical technique that separates liquid samples under high pressures. An HPLC instrument consists of glass bottles for storing solvents called mobile phase reservoirs. HPLC-grade solvents are used to maintain high purity, and the dissolved gases are removed using a degasser, such as a vacuum pumping system or sparging with helium. The solvents are then pumped into the analytical column using a screw-driven syringe or reciprocating pumps.
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.
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Post Column Derivatization Using Reaction Flow High Performance Liquid Chromatography Columns
06:25

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Published on: April 26, 2016

Gradient stationary phase optimized selectivity liquid chromatography with conventional columns.

Kai Chen1, Frédéric Lynen, Roman Szucs

  • 1Pfizer Analytical Research Centre, Ghent University, Krijgslaan 281, S4-bis, B-9000 Ghent, Belgium.

The Analyst
|March 27, 2013
PubMed
Summary
This summary is machine-generated.

Stationary phase optimized selectivity liquid chromatography (SOSLC) now couples conventional columns, enhancing gradient method development. This technique offers improved separation capabilities for complex mixtures using readily available LC columns.

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Area of Science:

  • Analytical Chemistry
  • Chromatography

Background:

  • Stationary phase optimized selectivity liquid chromatography (SOSLC) is a valuable technique for optimizing separation selectivity.
  • Current SOSLC protocols use specialized cartridges, limiting flexibility in method development.

Purpose of the Study:

  • To extend gradient SOSLC by enabling the coupling of conventional liquid chromatography (LC) columns.
  • To demonstrate the efficacy of this new approach for method development.

Main Methods:

  • Conventional LC columns were connected using generic tubing to create a combined column.
  • The method was tested using a mixture of 12 compounds (phenones, benzoic acids, hydroxybenzoates) under isocratic and gradient conditions.

Main Results:

  • Achieved fast and baseline separation of a complex mixture of 12 compounds.
  • Demonstrated the potential of gradient SOSLC with coupled conventional columns.

Conclusions:

  • Coupling conventional LC columns offers a flexible and effective approach to gradient SOSLC.
  • This extended SOSLC technique provides excellent possibilities for method development in chromatography.