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Peptide Identification Using Tandem Mass Spectrometry01:33

Peptide Identification Using Tandem Mass Spectrometry

Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...
Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

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...
High-Performance Liquid Chromatography: Introduction01:11

High-Performance Liquid Chromatography: Introduction

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.
In HPLC, two phases play a critical role in the separation process:

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Related Experiment Video

Updated: May 17, 2026

A Hydrogen-Deuterium Exchange Mass Spectrometry (HDX-MS) Platform for Investigating Peptide Biosynthetic Enzymes
11:32

A Hydrogen-Deuterium Exchange Mass Spectrometry (HDX-MS) Platform for Investigating Peptide Biosynthetic Enzymes

Published on: May 4, 2020

Analysis of biologically active peptides using two-dimensional HPLC-CE.

Małgorzata Jaworska1, Gabriela Kłaczkow, Małgorzata Wilk

  • 1Department of Biochemistry and Biopharmaceuticals, National Medicines Institute, Chełmska 30/34 St., Warszawa, Poland. m-jaworska@il.waw.pl

Acta Poloniae Pharmaceutica
|October 16, 2012
PubMed
Summary

This study combines high-performance liquid chromatography (HPLC) and capillary electrophoresis (CE) to improve peptide impurity analysis. The novel two-dimensional HPLC-CE method offers superior separation efficiency for complex peptide mixtures like octreotide impurities.

Related Experiment Videos

Last Updated: May 17, 2026

A Hydrogen-Deuterium Exchange Mass Spectrometry (HDX-MS) Platform for Investigating Peptide Biosynthetic Enzymes
11:32

A Hydrogen-Deuterium Exchange Mass Spectrometry (HDX-MS) Platform for Investigating Peptide Biosynthetic Enzymes

Published on: May 4, 2020

Area of Science:

  • Analytical Chemistry
  • Pharmaceutical Analysis

Background:

  • High-performance liquid chromatography (HPLC) is standard for peptide analysis.
  • Capillary electrophoresis (CE) offers high efficiency and speed for ionic compounds like peptides.
  • Combining separation techniques can enhance complex mixture analysis.

Purpose of the Study:

  • To develop a two-dimensional HPLC-CE technique for improved peptide separation.
  • To analyze impurities of the therapeutic peptide octreotide.
  • To enhance the comprehensiveness of impurity profiling in medicinal products.

Main Methods:

  • Development of a hyphenated two-dimensional HPLC-CE system.
  • Application of the developed system to analyze octreotide and its related impurities.
  • Utilizing distinct separation mechanisms inherent to both HPLC and CE.

Main Results:

  • The two-dimensional HPLC-CE technique achieved higher separation efficiency compared to individual methods.
  • A more comprehensive impurity profile of octreotide was obtained.
  • The method demonstrated effectiveness for analyzing complex peptide mixtures.

Conclusions:

  • Two-dimensional HPLC-CE significantly enhances separation efficiency for peptide impurity analysis.
  • This combined technique provides a more thorough impurity profile for pharmaceutical products.
  • HPLC-CE is a powerful tool for the advanced analysis of therapeutic peptides.