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DNA Isolation

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DNA from cells is required for many biotechnology and research applications, such as molecular cloning. To remove and purify DNA from cells, researchers use various methods of DNA extraction. While the specifics of different protocols may vary, some general concepts underlie the process of DNA extraction.

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Related Experiment Video

Updated: Apr 21, 2026

DNA-magnetic Particle Binding Analysis by Dynamic and Electrophoretic Light Scattering

DNA-magnetic Particle Binding Analysis by Dynamic and Electrophoretic Light Scattering

Published on: November 9, 2017

Magnetophoretic-based microfluidic device for DNA isolation.

C Hale¹, J Darabi¹

¹Department of Mechanical Engineering, Southern Illinois University Edwardsville , Edwardsville, Illinois 62026, USA.

Biomicrofluidics

|November 8, 2014

Summary

This study introduces a microfluidic device for efficient DNA separation from blood using magnetophoresis. The device offers faster, cheaper, and more precise DNA isolation for biological analysis.

Area of Science:

Biotechnology
Microfluidics
Molecular Biology

Background:

Traditional DNA isolation methods can be time-consuming and costly.
Microfluidic devices offer miniaturization and automation advantages for biological sample processing.

Purpose of the Study:

To develop and validate a continuous flow microfluidic device for DNA separation from blood using magnetophoresis.
To optimize the device for high purity, yield, and throughput of isolated DNA.

Main Methods:

Design and fabrication of a microfluidic chip with a micro-patterned nickel array.
Utilizing external permanent magnets to generate magnetic field gradients for magnetophoresis.
Comprehensive COMSOL Multiphysics simulations to analyze magnetic flux.
Experimental testing of the device for DNA isolation from blood samples.

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Main Results:

The microfluidic device successfully separated DNA from blood samples.
Achieved DNA purity of 1.8 or higher.
Obtained DNA yield up to 33 μg per milliliter of blood.
Demonstrated a volumetric throughput of up to 50 ml/h.

Conclusions:

The developed microfluidic device provides an efficient and cost-effective method for DNA isolation from blood.
The device is suitable for biological applications requiring high-purity, PCR-ready DNA.
Magnetophoresis in a continuous flow microfluidic system is a promising approach for rapid bio-separation.