Capillary Electrophoresis
Capillary electrophoresis is an analytical method for separating charged molecules in a capillary tube. It enables fast and precise analyses of very small sample volumes.
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Capillary Electrophoresis
Capillary electrophoresis is an analytical method for separating charged molecules in a capillary tube. It enables fast and precise analyses of very small sample volumes.
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Guide and selection support
Capillary electrophoresis is primarily used in analytics to separate ions based on their charge and size. The method is suitable for samples with extremely small volumes and provides rapid results within a few minutes. When selecting capillary electrophoresis systems, factors such as capillary dimensions, detection options, and software support are crucial. LabFinder offers a platform for specifically searching devices and accessories for capillary electrophoresis, supports the selection of suitable solutions, and facilitates comparison among different suppliers.
Applications and Benefits
Capillary electrophoresis (CE) is an analytical separation technique based on the migration of charged particles in an electric field. It is used in fields such as environmental analysis, quality control, pharmaceutical research, and clinical diagnostics. Separation in narrow capillaries allows for the investigation of very small sample volumes in the nanoliter range. The method is characterized by short analysis times of just a few minutes and enables the identification and quantification of ions, peptides, proteins, or nucleic acids.
Selection Criteria
Key criteria for selecting a capillary electrophoresis system include the type of samples and analytes, capillary diameter, available detection systems (e.g., UV-Vis, fluorescence), and the software for data analysis. Compatible electrolyte solutions and possible automation options are also important. Factors such as required analysis speed and ease of maintenance should also be considered.
Variants and Measurement Principles
Capillary electrophoresis includes various separation methods such as zone electrophoresis, capillary electrokinetic chromatography, and isoelectric focusing. All variants share the separation of charged molecules within capillaries, with migration speed influenced by the particles' charge, size, and shape. Buffered electrolyte solutions are typically used as separation media, and samples are moved by applying high voltage.
Calibration and Maintenance
Regular calibration of detection systems and inspection of electrodes are important for reproducible results. Capillaries require careful cleaning or replacement as needed to avoid contamination or performance loss. Maintenance also involves checking electrolyte solutions and electrical connections, as well as performing software updates for analysis programs.
Limitations of Application
Capillary electrophoresis is primarily suitable for charged and electrically active substances. Uncharged molecules can only be analyzed to a limited extent. High sample complexity or strongly variable matrix conditions can affect separation efficiency. For some applications, sensitivity is limited compared to other methods, such as mass spectrometry coupled to different separation techniques.
Search Terms and Related Terms
Capillary electrophoresis, capillary electrophoretic separation, CE, capillary electrophoresis analysis, electrophoresis capillary, capillary-electrophoresis, nanoliter sample size, electrokinetics, separation method, electrolyte solution, ion migration.
Also known as
Capillary-electrophoresis
Capillary electrophoresis analysis
Capillary electrophoresis analyzer
Capillary electrophoresis method
Capillary electrophoresis system
Capillary electrophoretic separation
Capillary migration electrophoresis
CE
Electrophoresis capillary
Electrophoresis with capillaries
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Frequently asked questions
How does capillary electrophoresis work?
Capillary electrophoresis separates charged particles by applying an electric field in a narrow capillary tube. The migration speed depends on the ions’ charge, size, and shape, allowing for their separation.
What are the variants of capillary electrophoresis?
Common variants include zone electrophoresis, capillary electrokinetic chromatography, and isoelectric focusing. These differ in separation mechanisms and the use of specific buffer systems.
Which factors are important when selecting a capillary electrophoresis system?
Crucial factors include sample type, capillary diameter, detection methods, data analysis software, and requirements for maintenance and calibration.
What sample volumes are required for capillary electrophoresis?
Sample volumes are typically in the nanoliter range, about 10 nl, making the method particularly suitable for small sample quantities.
What are the limitations of capillary electrophoresis in practice?
The technique is mainly suitable for electrically charged substances. Uncharged molecules can hardly be separated, and complex sample matrices may impair separation quality.
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