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Related Concept Videos

Ion-Exchange Chromatography01:09

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Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
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High-performance liquid chromatography, or HPLC, is an analytical technique that separates liquid samples under high pressures. An HPLC instrument consists of glass bottles for storing solvents called mobile phase reservoirs. HPLC-grade solvents are used to maintain high purity, and the dissolved gases are removed using a degasser, such as a vacuum pumping system or sparging with helium. The solvents are then pumped into the analytical column using a screw-driven syringe or reciprocating pumps.
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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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High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
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Chromatography: Introduction01:10

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Chromatography is a technique used to separate compounds based on differences of partitioning between two phases, the stationary phase and the mobile phase.
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Related Experiment Video

Updated: Feb 16, 2026

An Open-Source Normothermic Perfusion System Designed for Research Scientists
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Perfusion chromatography.

F E Regnier

    Nature
    |April 18, 1991
    PubMed
    Summary
    This summary is machine-generated.

    Perfusion chromatography uses fluid dynamics and large-pore supports to improve mass transfer in liquid chromatography. This technique enhances efficiency by allowing mobile phase to flow through particles, reducing stagnant zones.

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    Area of Science:

    • Analytical Chemistry
    • Separation Science

    Background:

    • Traditional liquid chromatography faces challenges with mass transfer limitations.
    • Stagnant mobile phase within particles hinders separation efficiency.

    Purpose of the Study:

    • To introduce and explain the principles of perfusion chromatography.
    • To highlight its advantage in overcoming mass transfer limitations.

    Main Methods:

    • Utilizes fluid dynamics principles.
    • Employs porous support materials with large pores.
    • Facilitates mobile phase flow through particles.

    Main Results:

    • Significantly reduces stagnant mobile phase mass transfer.
    • Enhances the speed and efficiency of liquid chromatography separations.

    Conclusions:

    • Perfusion chromatography offers a superior approach to traditional methods.
    • Its design is key to achieving faster and more effective chromatographic separations.