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Related Concept Videos

High-Performance Liquid Chromatography: Introduction01:11

High-Performance Liquid Chromatography: Introduction

3.0K
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:
3.0K
High-Performance Liquid Chromatography: Elution Process01:05

High-Performance Liquid Chromatography: Elution Process

2.0K
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...
2.0K
High-Performance Liquid Chromatography: Instrumentation00:57

High-Performance Liquid Chromatography: Instrumentation

2.8K
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.
2.8K
High-Performance Liquid Chromatography: Types of Detectors01:15

High-Performance Liquid Chromatography: Types of Detectors

2.3K
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...
2.3K
Optimizing Chromatographic Separations01:15

Optimizing Chromatographic Separations

1.3K
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...
1.3K
Gas Chromatography: Types of Columns and Stationary Phases01:17

Gas Chromatography: Types of Columns and Stationary Phases

4.0K
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...
4.0K

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Related Experiment Video

Updated: Apr 25, 2026

A Microfluidic Chip for ICPMS Sample Introduction
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A Microfluidic Chip for ICPMS Sample Introduction

Published on: March 5, 2015

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Phase-optimized chip-based liquid chromatography.

S Thürmann1, D Belder

  • 1Institute of Analytical Chemistry, University of Leipzig, Linnéstraße 3, 04103, Leipzig, Germany.

Analytical and Bioanalytical Chemistry
|August 30, 2014
PubMed
Summary

Phase-optimized columns enhance microfluidic chip liquid chromatography. This method precisely adjusts stationary phases for rapid, efficient separation of polycyclic aromatic hydrocarbons within minutes.

Area of Science:

  • Analytical Chemistry
  • Separation Science
  • Microfluidics

Background:

  • Microfluidic chip chromatography offers miniaturization and efficiency benefits.
  • Developing optimal stationary phases for specific analytes on-chip remains a challenge.

Purpose of the Study:

  • To introduce phase-optimized columns for highly efficient liquid chromatographic separations in microfluidic glass chips.
  • To demonstrate the prediction of on-chip column performance using standard High-Performance Liquid Chromatography (HPLC) experiments.

Main Methods:

  • Investigated the separation of nine polycyclic aromatic hydrocarbons (PAHs) under reversed-phase conditions.
  • Utilized standard HPLC to determine retention parameters on various stationary phases.
  • Calculated optimal on-chip column properties assuming zero-void-volume performance.

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Main Results:

  • A 30 mm phase-optimized on-chip column achieved baseline resolution of all nine PAHs in under 4 minutes.
  • Separation performance of chip columns can be accurately predicted from traditional HPLC experiments.
  • Demonstrated precise adjustment of stationary phase selectivity and geometry for optimal separation.

Conclusions:

  • Phase-optimized columns enable highly efficient and rapid separations in microfluidic chromatography.
  • The predictive capability of standard HPLC experiments facilitates the development of tailor-made chromatography chips.
  • This approach holds significant potential for directed development of specialized microfluidic separation devices.