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Related Concept Videos

Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

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Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
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Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

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Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and signal-to-noise ratio for the analyte. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.
Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called collision-induced...
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MALDI-TOF Mass Spectrometry01:19

MALDI-TOF Mass Spectrometry

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Mass spectrometry is a powerful characterization technique that can identify and separate a wide variety of compounds ranging from chemical to biological entities, based on their mass-to-charge ratio (m/z). The instruments that allow this detection, known as mass spectrometers, have three components: an ion source, a mass analyzer, and a detector. These spectrometers differ based on the nature of their ion source and analyzers.
Matrix-assisted laser desorption ionization (MALDI) is a commonly...
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Mass Spectrometry: Overview01:19

Mass Spectrometry: Overview

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Mass spectrometry is an analytical technique used to determine the molecular mass and molecular formula of a compound. The basic principle of mass spectrometry is to generate ions from the analyte molecule and measure these ion abundances against their molecular mass.  One common type of ionization, known as electrospray ionization or EI, bombards the analyte molecules in the gas phase with high-energy electron beams. The electron beams displace an electron from the molecule and leave...
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Peptide Identification Using Tandem Mass Spectrometry01:33

Peptide Identification Using Tandem Mass Spectrometry

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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.
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Mass Spectrometers01:16

Mass Spectrometers

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This lesson details the instrumentation of a mass spectrometer—a physical instrument to perform mass spectrometry on analyte molecules and record the characteristic mass spectra. This is achieved via three chief functions:
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Related Experiment Video

Updated: Oct 26, 2025

Large Scale Non-targeted Metabolomic Profiling of Serum by Ultra Performance Liquid Chromatography-Mass Spectrometry UPLC-MS
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Current Challenges and Recent Developments in Mass Spectrometry-Based Metabolomics.

Stephanie L Collins1, Imhoi Koo2,3, Jeffrey M Peters2

  • 1Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.

Annual Review of Analytical Chemistry (Palo Alto, Calif.)
|July 27, 2021
PubMed
Summary
This summary is machine-generated.

High-resolution mass spectrometry (MS) advances metabolomics by measuring many metabolites. However, challenges in data analysis and identification hinder progress, requiring new computational and experimental tools for accurate metabolite research.

Keywords:
chromatographyisotope tracingmass spectrometrymetabolomicsmulti-stage mass spectrometryretention indices

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Last Updated: Oct 26, 2025

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Area of Science:

  • Metabolomics
  • Analytical Chemistry
  • Biochemistry

Background:

  • High-resolution mass spectrometry (MS) enables large-scale metabolite measurement in biological systems.
  • Advances in MS sensitivity have increased analyte detection but outpaced data processing and identification strategies.

Purpose of the Study:

  • To review the challenges in MS-based metabolomics, particularly liquid chromatography-MS (LC-MS).
  • To highlight tools developed to overcome these analytical and computational hurdles.

Main Methods:

  • Focus on liquid chromatography-mass spectrometry (LC-MS) methods due to their popularity and sensitivity.
  • Discussion of challenges including de novo metabolite identification, isomer separation, and database limitations.

Main Results:

  • Identified key challenges in MS-based metabolomics: metabolite identification, distinguishing from contaminants, isomer separation, and incomplete databases.
  • Highlighted the development of instrumental, experimental, and computational tools to address these issues.

Conclusions:

  • Despite challenges, advancements in tools are enabling progress in metabolomics research.
  • Addressing data analysis and identification bottlenecks is crucial for realizing the full potential of MS in studying metabolism.