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Related Concept Videos

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.
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...
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...
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...
Thin-Layer Chromatography (TLC): Overview01:11

Thin-Layer Chromatography (TLC): Overview

Thin-layer chromatography (TLC) is a chromatography technique that separates compounds based on their polarity. TLC typically uses polar silica gel, a form of silicon dioxide, as the stationary phase. The silica gel contains hydroxyl (OH) groups on its surface, which form hydrogen bonds with polar compounds, influencing their adhesion to the stationary phase.
To begin the analysis, a mixture of compounds is spotted on the starting line on the TLC plate using a thin capillary. The bottom of the...

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Updated: Jun 15, 2026

Automated HPLC Separation Using LC-Mate: An Integrated Repetitive Autosampler and Fraction Collector for Microscale Purification
07:11

Automated HPLC Separation Using LC-Mate: An Integrated Repetitive Autosampler and Fraction Collector for Microscale Purification

Published on: February 27, 2026

Cascade optical chromatography for sample fractionation.

Alex Terray1, Joseph D Taylor, Sean J Hart

  • 1Chemistry Division, Bio/Analytical Chemistry, Naval Research Laboratory, Code 6112, 4555 Overlook Ave. S.W., Washington, DC 20375, USA.

Biomicrofluidics
|March 11, 2010
PubMed
Summary
This summary is machine-generated.

Optical chromatography uses laser beams and fluid dynamics to separate particles in microfluidic devices. This technique effectively fractionates diverse samples, including biological and inorganic particles.

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Last Updated: Jun 15, 2026

Automated HPLC Separation Using LC-Mate: An Integrated Repetitive Autosampler and Fraction Collector for Microscale Purification
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Area of Science:

  • Analytical Chemistry
  • Microfluidics
  • Optics

Background:

  • Optical chromatography leverages optical and fluid drag forces for particle analysis and separation.
  • Particles are trapped and balanced by these forces within microfluidic channels.
  • Sensitivity to physical and chemical properties enables sample differentiation.

Purpose of the Study:

  • To demonstrate an advanced microfluidic platform for optical chromatography.
  • To showcase the fractionation of multicomponent particle samples.
  • To develop a sequential cascade separation system using multiple lasers.

Main Methods:

  • Utilizing opposing optical and fluid drag forces within microfluidic environments.
  • Employing a focused laser beam to trap and balance particles.
  • Integrating a three-stage microfluidic design with simultaneous laser accommodation.

Main Results:

  • Demonstrated effective fractionation of inorganic, polymeric, and biological particle samples.
  • Showcased the tunable filtering capability of a full-channel optical beam.
  • Successfully implemented a sequential cascade optical chromatographic separation system.

Conclusions:

  • Optical chromatography is a versatile technique for particle separation and analysis.
  • Advanced microfluidic designs enhance the efficiency and capability of optical chromatography.
  • This method offers a powerful tool for fractionating complex particle mixtures.