Microchip Electrophoresis Technique
Microchip Electrophoresis Technique - Related Videos
04:21
Microfluidic Capillary Electrophoresis for Fragment Sizing of PCR Products: A Microchip-Based Electrophoretic Separation Technique to Separate DNA Fragments Based on Size
0 Views •
2025
This video describes the microfluidic capillary electrophoresis technique to separate PCR amplicons based on their size. This technique helps in fragment sizing using fluorescent dyes and standard molecular size markers.
09:42
Fabrication of a Dipole-assisted Solid Phase Extraction Microchip for Trace Metal Analysis in Water Samples
0 Views •
2016
The fabrication protocol of a dipole-assisted solid phase extraction microchip for the trace metal analysis is presented.
07:31
Two-Dimensional Gel Electrophoresis
0 Views •
2023
Two-dimensional gel electrophoresis (2DGE) is a technique that can resolve thousands of biomolecules from a mixture. This technique involves two distinct separation methods that have been coupled together: isoelectric focusing (IEF) and sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). This physically separates compounds across two axes of a gel by their isoelectric points (an electrochemical property) and their molecular weights. The procedure in this video covers the main...
03:29
Capillary Electrophoresis: A Technique to Analyze Fluorescently Labeled Polymerase Chain Reaction Amplicons
0 Views •
2025
This video describes the technique of capillary electrophoresis to analyze fluorescently labeled PCR amplicons obtained from various samples based on their size. It generates a migratory pattern that determines the fragments’ base-pair lengths with the help of the labeled fluorescent dye in each fragment.
08:50
Capillary Electrophoresis (CE)
0 Views •
2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia Capillary electrophoresis (CE) is a separation technique that separates molecules in an electric field according to size and charge. CE is performed in a small glass tube called a capillary that is filled with an electrolyte solution. Analytes are separated due to differences in electrophoretic mobility, which varies with charge, solvent viscosity, and size. Traditional electrophoresis in gels is limited in the amount of voltage...
FAQs
Migration reflects more than molecular size alone. In a buffered channel, the electric field drives charged analytes, while electrophoretic mobility determines how quickly each species travels. Charge and size influence that mobility, and interactions with the channel or an added sieving matrix can alter migration rates. These combined effects create distinguishable positions or signals for analysis.
Buffering provides the channel environment in which the electric field can move analytes, while a sieving matrix adds another basis for differentiating them. Because the matrix can influence electrophoretic mobility, molecules with otherwise similar behavior may acquire different migration rates. This is especially relevant when resolving biological mixtures containing DNA fragments, RNA, proteins, or peptides.
After migration separates the components, the chip can use optical or electrochemical detection to register the resulting analyte signals. These detection modes are part of the analytical workflow rather than the separation mechanism itself: the electric field establishes different migration rates, and the detector records those differences. This arrangement supports compact analysis of biomolecular samples.
A typical workflow places a biological sample and buffer within a microfabricated channel, applies an electric field, and monitors analyte migration with optical or electrochemical detection. Depending on the system, sample preparation or detection may be integrated into the chip. The compact format reduces sample and reagent consumption while supporting rapid analysis.
In biological techniques, the method can analyze DNA fragments, RNA, proteins, peptides, and other biomolecules. This range allows one platform to address different molecular targets rather than a single analyte class. Its small-volume operation and potential for high-throughput workflows make it useful when researchers need rapid analysis across many samples or limited material.
It is particularly valuable when speed, low sample and reagent consumption, or a compact format matters. Integrated sample preparation and detection can support streamlined workflows, while the small platform is relevant to potential point-of-care diagnostics. In research, these features connect separation performance with practical needs such as throughput, compact instrumentation, and limited specimen availability.