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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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Using a Cyclic Ion Mobility Spectrometer for Tandem Ion Mobility Experiments
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Published on: January 20, 2022

Ion mobility-mass spectrometry.

Abu B Kanu1, Prabha Dwivedi, Maggie Tam

  • 1Department of Chemistry, Washington State University, Pullman, WA 99164-4630, USA.

Journal of Mass Spectrometry : JMS
|January 18, 2008
PubMed
Summary
This summary is machine-generated.

Ion mobility-mass spectrometry (IMMS) enhances analytical capabilities by separating complex mixtures and identifying specific molecules. This review compares four key IMMS techniques: DTIMS, AIMS, DMS/FAIMS, and TWIMS, highlighting their unique advantages.

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T-wave Ion Mobility-mass Spectrometry: Basic Experimental Procedures for Protein Complex Analysis
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T-wave Ion Mobility-mass Spectrometry: Basic Experimental Procedures for Protein Complex Analysis

Published on: July 31, 2010

Area of Science:

  • Analytical Chemistry
  • Spectrometry
  • Separation Science

Background:

  • Mass spectrometry (MS) alone has limitations in resolving complex mixtures.
  • Ion mobility spectrometry (IMS) coupled with MS (IMMS) provides additional separation dimensions.
  • IMMS enables separation of isomers, isobars, and conformers, reducing chemical noise and measuring ion size.

Purpose of the Study:

  • To compare and contrast available ion mobility-mass spectrometer types.
  • To describe the advantages of different IMMS methods for various analytes.
  • To review the four primary ion mobility separation methods used with MS.

Main Methods:

  • Review of four ion mobility separation techniques integrated with mass spectrometry: drift-time IMS (DTIMS), aspiration IMS (AIMS), differential-mobility spectrometry (DMS)/field-asymmetric waveform IMS (FAIMS), and traveling-wave IMS (TWIMS).
  • Discussion of the principles, capabilities, and applications of each method.
  • Analysis of the performance characteristics, including resolving power, sensitivity, and integration with commercial MS systems.

Main Results:

  • DTIMS offers the highest resolving power and direct measurement of collision cross-sections.
  • AIMS provides low-resolution, continuous ion monitoring.
  • DMS/FAIMS enable continuous monitoring and orthogonal separation with high selectivity.
  • TWIMS is a novel method with good sensitivity and commercial MS integration, despite lower resolving power.

Conclusions:

  • Each IMMS technique offers distinct advantages for specific analytical challenges.
  • The choice of IMMS method depends on the required resolving power, sensitivity, and analytical application.
  • IMMS significantly expands the capabilities of mass spectrometry for analyzing complex samples.