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Overview Of Cell Separation And Isolation

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.

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Related Experiment Video

Updated: Nov 27, 2025

On-chip Isotachophoresis for Separation of Ions and Purification of Nucleic Acids

On-chip Isotachophoresis for Separation of Ions and Purification of Nucleic Acids

Published on: March 2, 2012

Cyclic on-chip bacteria separation and preconcentration.

Vitaly V Ryzhkov¹, Alexander V Zverev^1,2, Vladimir V Echeistov^1,2

¹FMN Laboratory, Bauman Moscow State Technical University, Moscow, Russia, 105005.

Scientific Reports

|December 4, 2020

Summary

This summary is machine-generated.

This study presents an automated microfluidic chip for separating and concentrating E. coli bacteria from nanoparticles. The method uses microfiltration with integrated valves, achieving high efficiency and throughput for healthcare applications.

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Area of Science:

Biotechnology
Microfluidics
Nanotechnology

Background:

High-throughput separation of nanoparticles and biological molecules is crucial for healthcare and nanoscience.
Existing methods often lack efficiency, robustness, or automation for complex sample mixtures.

Purpose of the Study:

To develop an automated, on-chip method for efficient separation and preconcentration of dissimilar sized particles.
To sort and concentrate micro-sized E. coli bacteria from nanoparticles using a microfluidic platform.

Main Methods:

Utilized a microfluidic chip with six integrated pneumatic valves and a 0.45 μm pore diameter hydrophilic PVDF filter.
Implemented an automated sorting sequence involving sample filtration, dead volume washout, and reverse flow backflush.
Optimized separation and preconcentration using pulse backflush modes and controlled volumes.

Main Results:

Achieved E. coli cell separation efficiency up to 81.33% at a throughput of 120.45 μL/min.
Demonstrated preconcentration efficiency of 121.96% with a trimmed backflush mode at 80.93 μL/min.
Reported cyclic preconcentration efficiencies of 536% at 1.98 μL/min and 294% at 10.9 μL/min.

Conclusions:

The developed microfluidic system offers an efficient and robust on-chip solution for particle separation and preconcentration.
Optimized pulse backflush and cyclic methods significantly enhance separation and preconcentration performance.
This technology holds promise for various healthcare and nanoscience applications requiring precise sample preparation.