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Related Concept Videos

Mass Spectrum: Interpretation01:24

Mass Spectrum: Interpretation

An unknown compound can be established by identifying the molecular ion peak in the mass spectrum. The molecular ion peak is often weak or absent due to the predominance of fragmentation in high-energy electron beams. In such cases, a soft-energy electron beam can be used to scan the spectrum to enhance the intensity of the molecular ion peak. Additionally, chemical ionization, field ionization, and desorption ionization spectra are used to obtain a relatively intense molecular ion peak.To...
MALDI-TOF Mass Spectrometry01:19

MALDI-TOF Mass Spectrometry

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...
Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

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...
Mass Spectrometry: Overview01:19

Mass Spectrometry: Overview

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 electron 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 behind a...
Mass Spectrometers01:16

Mass Spectrometers

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:
Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. 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...

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Related Experiment Video

Updated: May 21, 2026

Whole-body Mass Spectrometry Imaging by Infrared Matrix-assisted Laser Desorption Electrospray Ionization (IR-MALDESI)
10:47

Whole-body Mass Spectrometry Imaging by Infrared Matrix-assisted Laser Desorption Electrospray Ionization (IR-MALDESI)

Published on: March 24, 2016

Imaging mass spectrometry statistical analysis.

Emrys A Jones1, Sören-Oliver Deininger2, Pancras C W Hogendoorn3

  • 1Biomolecular Mass Spectrometry Unit, Department of Parasitology, Leiden University Medical Center, Leiden, The Netherlands.

Journal of Proteomics
|June 30, 2012
PubMed
Summary

This review clarifies imaging mass spectrometry data analysis for biomarker discovery. It details data characteristics and analysis strategies, emphasizing correct application for reliable research findings.

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Area of Science:

  • Biomedical Imaging
  • Analytical Chemistry
  • Computational Biology

Background:

  • Imaging mass spectrometry (IMS) is a powerful tool for identifying novel biomarkers in clinical research.
  • IMS applications require a multidisciplinary approach, integrating mass spectrometry, histology, disease biology, and statistics.
  • Analyzing IMS data presents unique challenges due to its distinct data structure compared to traditional mass spectrometry datasets.

Purpose of the Study:

  • To provide an accessible review of imaging mass spectrometry data characteristics.
  • To outline various data analysis strategies applicable to IMS.
  • To highlight the assumptions underlying different IMS data analysis routines for correct usage.

Main Methods:

  • Review of existing literature on imaging mass spectrometry data analysis.
  • Explanation of the unique properties of imaging mass spectrometry datasets.
  • Discussion of statistical approaches and assumptions for analyzing imaging mass spectrometry data.

Main Results:

  • Identification of key differences between IMS data and other mass spectrometry data types.
  • Categorization of common data analysis strategies for IMS.
  • Emphasis on the importance of understanding and applying correct analytical assumptions for robust results.

Conclusions:

  • Accurate interpretation of IMS data is crucial for reliable biomarker discovery.
  • Understanding the specific assumptions of data analysis routines is essential for researchers.
  • This review aims to improve the quality and reproducibility of imaging mass spectrometry research.