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Related Concept Videos

Capillary Electrophoresis: Instrumentation01:20

Capillary Electrophoresis: Instrumentation

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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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Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

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Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
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Two-dimensional Gel Electrophoresis01:22

Two-dimensional Gel Electrophoresis

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Two-dimensional gel electrophoresis is a high-resolution protein separation method first introduced by O' Farrell and Klose in 1975. This method involves protein separation by two dimensions, mass and charge, making it more accurate than one-dimensional gel electrophoresis.
The first dimension separation uses the isoelectric focusing or IEF technique performed on immobilized pH gradient (IPG) strips that separate proteins according to their isoelectric points.
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Capillary Beds01:20

Capillary Beds

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Capillary beds are networks of tiny blood vessels that play a crucial role in the circulatory system. These beds are where the exchange of gases, nutrients, and waste products occurs between the blood and surrounding tissues. Each capillary bed consists of numerous capillaries, which are the smallest blood vessels in the body, typically only one cell-thick. This thinness allows for the efficient diffusion of substances.
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Capillary Exchange01:28

Capillary Exchange

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The cardiovascular system's chief role is to disseminate gases, nutrients, waste, and other substances to the body's cells. Small molecules like gases, lipids, and lipid-soluble substances directly diffuse through capillary wall endothelial cell membranes. Glucose, amino acids, and ions, including sodium, potassium, calcium, and chloride, use transporters for facilitated diffusion via membrane-specific channels. Glucose, ions, and bigger molecules may also pass through intercellular...
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Electrophoresis: Overview01:20

Electrophoresis: Overview

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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.
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Updated: Jan 28, 2026

Planar and Three-Dimensional Printing of Conductive Inks
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A three-dimensional printed electromembrane extraction device for capillary electrophoresis.

Ming Li Tan1, Min Zhang2, Feng Li1

  • 1Australian Centre for Research on Separation Science (ACROSS), School of Natural Sciences - Chemistry, University of Tasmania, Private Bag 75, Hobart, TAS, 7001, Australia.

Journal of Chromatography. A
|March 12, 2019
PubMed
Summary

Researchers developed a 3D-printed electromembrane extraction device for efficient anion preconcentration. This novel method achieves high recovery rates and accurate ion detection in water and soil samples.

Keywords:
3D printingAnionsCapillary electrophoresisElectromembrane extractionPreconcentration

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Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Separation Science

Background:

  • Electromembrane extraction (EME) is a liquid-phase extraction technique.
  • 3D printing offers rapid prototyping and customization of analytical devices.

Purpose of the Study:

  • To design and fabricate a novel 3D-printed concentric electromembrane extraction device.
  • To evaluate the device's performance for anion preconcentration from aqueous samples.
  • To assess the device's applicability for analyzing real-world samples like soil slurries.

Main Methods:

  • Fabrication of a concentric EME device using fused deposition modeling 3D printing with conductive polylactic acid (PLA).
  • Utilizing a hemispherical electrode sample vial and a porous membrane acceptor vial.
  • Applying voltage to induce anion migration through the porous membrane into the acceptor solution.

Main Results:

  • Achieved high preconcentration rates (0.833 μM/sec) and recovery (95%) for fluorescein.
  • Obtained preconcentration factors of 36-44 for chloride, nitrate, perchlorate, and sulfate.
  • Determined low limits of detection (LOD) for key anions (e.g., 0.16 μM for nitrate).
  • Successfully extracted and quantified nitrate and sulfate from unfiltered soil slurry.

Conclusions:

  • The 3D-printed EME device is effective for anion preconcentration and detection.
  • The device demonstrates high efficiency, recovery, and sensitivity for various anions.
  • This technology shows promise for simplified analysis of environmental samples.