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Capillary Electrophoresis: Instrumentation

Capillary Electrophoresis: Instrumentation

Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...

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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.
There...

Two-dimensional Gel Electrophoresis

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SDS-PAGE

SDS-PAGE

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Updated: Jun 20, 2026

Label-free Isolation and Enrichment of Cells Through Contactless Dielectrophoresis

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Published on: September 3, 2013

Dielectrophoresis-Based Sample Handling in General-Purpose Programmable Diagnostic Instruments.

Peter R C Gascoyne¹, Jody V Vykoukal

¹Department of Molecular Pathology, M.D., Anderson Cancer Center, University of Texas, Houston, TX 77030 USA.

Proceedings of the IEEE. Institute of Electrical and Electronics Engineers

|August 18, 2009

Summary

This summary is machine-generated.

This study introduces an integrated programmable general-purpose sample analysis processor (GSAP) for microscale molecular diagnostics. This automated system aims to make advanced biomedical discoveries accessible globally, even in resource-limited settings.

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Area of Science:

Biomedical engineering
Molecular diagnostics
Microsystems technology

Background:

Understanding molecular disease origins necessitates advanced diagnostic tools.
Current miniaturized diagnostic systems often rely on external, labor-intensive sample preparation.
There is a need for automated, integrated microscale diagnostic solutions for broad accessibility.

Purpose of the Study:

To present an integrated programmable general-purpose sample analysis processor (GSAP) architecture.
To enable on-device sample preparation and molecular analysis for microscale diagnostics.
To review dielectrophoresis-based methods for building GSAP functional blocks.

Main Methods:

Conceptualizing an integrated GSAP architecture.
Reviewing dielectrophoresis (DEP)-based methods for functional blocks.
Exploring DEP applications: cell/particle sorting, focusing, impedance analysis, lysis, and droplet manipulation.

Main Results:

The proposed GSAP architecture integrates sample processing and analysis within a single device.
Dielectrophoresis offers a versatile platform for various microscale sample manipulation tasks.
Potential for automated, rapid, and affordable microscale molecular diagnostics.

Conclusions:

The GSAP concept offers a pathway to automated, integrated microscale molecular diagnostics.
Dielectrophoresis-based methods are foundational for developing GSAP functional blocks.
This technology can enhance global access to biomedical discoveries, irrespective of infrastructure.