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Related Concept Videos

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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High-Performance Liquid Chromatography: Elution Process01:05

High-Performance Liquid Chromatography: Elution Process

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In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...
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High-Performance Liquid Chromatography: Introduction01:11

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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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Electrophoresis: Overview01:20

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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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Capillary Electrophoresis: Instrumentation01:20

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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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Principles Of Column Chromatography01:13

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The chromatography technique was first invented in 1901 by Michael S. Tswett, a Russian botanist, to separate plant pigments using organic solvents. Further, in 1941, Archer John Porter Martin and R. L. M. Synge modified the technique by packing silica gel into a column. A mixture of amino acids was then separated on the packed column using chloroform and water mixture as the mobile phase. This was the first report on column chromatography. At present, column chromatography is a widely used...
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Boosting basic-peptide separation through dynamic electrostatic-repulsion reversed-phase (d-ERRP) liquid

Giulia Mazzoccanti1, Simone Manetto1, Michele Bassan2

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A new chromatographic method offers superior analysis of therapeutic peptides, effectively separating complex impurities for better drug quality assessment.

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Area of Science:

  • Analytical Chemistry
  • Pharmaceutical Science

Background:

  • Therapeutic peptides are crucial pharmaceuticals.
  • Ensuring the quality of peptide-based drugs is essential for patient safety.
  • Existing analytical methods may struggle to resolve complex impurities in peptides.

Purpose of the Study:

  • To develop and validate a novel chromatographic technique for analyzing therapeutic peptides.
  • To achieve high-resolution separation of peptide-related impurities, including challenging epimeric and isobaric forms.
  • To establish a superior analytical tool for pharmaceutical quality control.

Main Methods:

  • Application of a novel chromatographic approach.
  • Analysis of therapeutic peptides containing basic amino acids.
  • Separation and identification of related impurities.

Main Results:

  • Achieved unprecedented resolution of peptide-related impurities.
  • Successfully separated epimeric and isobaric impurities.
  • Demonstrated the method's superiority as an analytical tool.

Conclusions:

  • The novel chromatographic method provides a superior analytical tool for therapeutic peptide quality evaluation.
  • This approach enhances the ability to detect and quantify critical impurities in marketed peptide drugs.
  • Improved impurity profiling contributes to better drug safety and efficacy.