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Related Concept Videos

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: 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: 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...
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...
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...
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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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

[Interface of two dimensional liquid chromatography].

Kun Ding1, Dapeng Wu, Yafeng Guan

  • 1Department of Instrumentation & Analytical Chemistry, Dalian Institute of Chemical Physics, Key Lab of Separation Science for Analytical Chemistry, Chinese Academy of Sciences, Dalian 116023, China.

Se Pu = Chinese Journal of Chromatography
|March 29, 2011
PubMed
Summary
This summary is machine-generated.

Two-dimensional liquid chromatography (2D-LC) enhances complex sample separation. This review focuses on the critical interface technology, detailing its role in mobile phase removal and solute focusing for improved analytical performance.

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Automated Hydrophobic Interaction Chromatography Column Selection for Use in Protein Purification
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Area of Science:

  • Analytical Chemistry
  • Chromatography

Context:

  • Two-dimensional liquid chromatography (2D-LC) offers superior separation capabilities for complex mixtures compared to 1D-LC.
  • The interface is crucial for optimizing 2D-LC performance, enabling efficient analyte transfer between dimensions.

Purpose:

  • To provide a comprehensive review of the interface technology in 2D-LC systems.
  • To highlight the importance of interface design for mobile phase removal and solute focusing.

Summary:

  • 2D-LC systems utilize specialized interfaces to manage mobile phase and concentrate analytes between chromatographic dimensions.
  • Effective interface design is key to achieving the enhanced peak capacity and selectivity characteristic of 2D-LC.

Impact:

  • This review serves as a valuable resource for researchers and practitioners in chromatography.
  • Understanding interface mechanisms can lead to the development of more efficient and powerful 2D-LC methods for complex sample analysis.