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Related Concept Videos

High-Performance Liquid Chromatography: Elution Process01:05

High-Performance Liquid Chromatography: Elution Process

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.
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:
High-Performance Liquid Chromatography: Types of Detectors01:15

High-Performance Liquid Chromatography: Types of Detectors

The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte properties and...
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...
Chromatography: Introduction01:10

Chromatography: Introduction

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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Related Experiment Video

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2D-HPLC-MS Technology Combined with Molecular Network for the Identification of Components in Tibetan Medicine Aconitum pendulum
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2D-HPLC-MS Technology Combined with Molecular Network for the Identification of Components in Tibetan Medicine Aconitum pendulum

Published on: December 8, 2023

Implementations of two-dimensional liquid chromatography.

Georges Guiochon1, Nicola Marchetti, Khaled Mriziq

  • 1Department of Chemistry, University of Tennessee, Knoxville, TN 37996-1600, USA. quiochon@utk.edu

Journal of Chromatography. A
|March 14, 2008
PubMed
Summary
This summary is machine-generated.

Two-dimensional chromatography offers faster separation of complex samples compared to one-dimensional methods. The LC(x)xLC(t) combination shows promise for significant time savings in analytical separations.

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2D-HPLC-MS Technology Combined with Molecular Network for the Identification of Components in Tibetan Medicine Aconitum pendulum
07:50

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Post Column Derivatization Using Reaction Flow High Performance Liquid Chromatography Columns
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Area of Science:

  • Analytical Chemistry
  • Chromatography
  • Separation Science

Background:

  • Complex samples often require advanced separation techniques beyond one-dimensional chromatography.
  • Traditional methods can be time-consuming, necessitating more efficient analytical approaches.
  • Two-dimensional chromatography (2D-LC) offers enhanced peak capacity and reduced analysis time.

Purpose of the Study:

  • To review and compare four potential combinations of two-dimensional chromatography.
  • To evaluate the advantages, drawbacks, and performance of different 2D-LC strategies.
  • To identify promising 2D-LC configurations for complex sample analysis.

Main Methods:

  • Categorization of separations into chromatographic separations in space (LC(x)) and in time (LC(t)).
  • Exploration of four combinations: LC(t)xLC(t), LC(x)xLC(t), LC(t)xLC(x), and LC(x)xLC(x).
  • Comparative analysis of the performance, benefits, and challenges of each 2D-LC approach.

Main Results:

  • Column-based LC(t)xLC(t) combinations are currently the most researched.
  • The LC(x)xLC(t) combination demonstrates exceptional potential for simultaneous second-dimension separations.
  • LC(x)xLC(t) offers remarkable time-saving benefits by separating all first-dimension fractions concurrently.

Conclusions:

  • Two-dimensional chromatography is essential for efficiently analyzing complex samples.
  • The LC(x)xLC(t) configuration presents a highly promising strategy for advanced chromatographic separations.
  • Further investigation into LC(x)xLC(t) is warranted due to its significant time-saving potential.