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Related Concept Videos

Overview Of Cell Separation And Isolation01:20

Overview Of Cell Separation And Isolation

Cell separation was first achieved in 1964 by S. H. Seal, who separated large tumor cells from the smaller blood cells using filtration. Two years later, Pohl and Hawk performed experiments on how cells respond differently to a nonuniform electric field based on the cell type. Such observations were the inception of cell separation methods, which allow isolating a single cell type from a heterogeneous sample.
Subcellular Fractionation01:32

Subcellular Fractionation

The homogenate obtained after cell lysis contains various membrane-bound organelles that can be further separated into pure fractions by subcellular fractionation. These isolates are used to study specific cellular components, analyze localized protein activity, and are even employed in diagnostics. Fractionation is typically achieved using centrifugation methods, the most common being density-gradient and differential centrifugation.
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High-Performance Liquid Chromatography: Introduction01:11

High-Performance Liquid Chromatography: Introduction

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Electrophoresis: Overview01:20

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Electrophoresis is a powerful analytical separation technique that relies on the differential migration of charged species when subjected to an electric field. The core strength of electrophoresis lies in its ability to separate high-molecular-weight species in complex mixtures. It has found widespread use in biochemistry, molecular biology, and analytical chemistry, allowing the separation of compounds like amino acids, nucleotides, carbohydrates, and proteins with excellent resolution.
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Capillary Electrophoresis: Applications01:30

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Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...

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Related Experiment Video

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Cellular Lipid Extraction for Targeted Stable Isotope Dilution Liquid Chromatography-Mass Spectrometry Analysis
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Evaluation of separation performance and quantification accuracy in lipidomics methods.

Noriyuki Tomiyasu1, Yoshihiro Izumi2, Omidreza Heraviadeh1

  • 1Department of Systems Life Sciences, Graduate School of Systems Life Sciences, Kyushu University, Fukuoka, Japan.

Journal of Chromatography. A
|July 3, 2025
PubMed
Summary

This study compared four lipidomics analytical methods: flow injection (FI), reversed-phase liquid chromatography (RP-LC), hydrophilic interaction liquid chromatography (HILIC), and supercritical fluid chromatography (SFC). SFC-MS/MS demonstrated superior chromatographic performance over HILIC-MS/MS for lipid analysis.

Keywords:
Flow injectionHydrophilic interaction liquid chromatographyLipidomicsMass spectrometryQuantification accuracyReverse-phase liquid chromatographySupercritical fluid chromatography

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Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Mass Spectrometry

Background:

  • Lipidomics relies on mass spectrometry, but diverse analytical methods cause variations in results.
  • Key methods include flow injection (FI), reversed-phase liquid chromatography (RP-LC), and hydrophilic interaction liquid chromatography (HILIC).
  • Supercritical fluid chromatography (SFC) shows promise for separating lipid isomers, but comparative studies are scarce.

Purpose of the Study:

  • To quantitatively compare the performance of FI, RP-LC, HILIC, and SFC coupled with MS/MS for lipidomics.
  • To evaluate chromatographic performance differences between HILIC-MS/MS and SFC-MS/MS.
  • To provide guidance on selecting appropriate analytical methods for lipidomics based on specific requirements.

Main Methods:

  • Quantitative analysis of 355 lipid species across 14 classes using NIST SRM1950 plasma.
  • Four methods (FI, RP-LC, HILIC, SFC) coupled to triple quadrupole MS/MS were evaluated under identical conditions.
  • Chromatographic parameters (analysis time, pressure, theoretical plate height, isomer separation) were compared for HILIC-MS/MS and SFC-MS/MS.

Main Results:

  • No significant quantitative differences were observed for six lipid classes across the four methods.
  • Notable method-specific variations in quantification were found for other lipid classes.
  • SFC-MS/MS significantly outperformed HILIC-MS/MS in chromatographic parameters, including isomer separation.

Conclusions:

  • All evaluated methods are applicable to lipidomics, but performance varies by lipid class.
  • SFC-MS/MS offers superior chromatographic separation, particularly for isomers, compared to HILIC-MS/MS.
  • Method selection in lipidomics should align with specific analytical needs, such as target lipids, sample availability, and desired analysis time.