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Related Concept Videos

Mass Analyzers: Overview01:13

Mass Analyzers: Overview

1.9K
The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...
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Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

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The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
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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:
9.7K
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...
2.0K
Mass Spectrometry: Overview01:19

Mass Spectrometry: Overview

9.6K
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...
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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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Related Experiment Video

Updated: Mar 10, 2026

Improved Polymerase Chain Reaction-restriction Fragment Length Polymorphism Genotyping of Toxic Pufferfish by Liquid Chromatography/Mass Spectrometry
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Mass Analyzers and Mass Spectrometers.

Anthony M Haag1,2

  • 1Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX, 77030, USA. Anthony.Haag@bcm.edu.

Advances in Experimental Medicine and Biology
|December 16, 2016
PubMed
Summary

Mass spectrometers use mass analyzers to determine analyte mass-to-charge ratios, crucial for molecular biology applications. Analyzer selection depends on analyte properties and experimental needs.

Keywords:
FT-ICR mass analyzerIon trap mass analyzerMass analyzerMass spectrometerNeutral loss scanOrbitrap mass analyzerPrecursor ion scanProduct ion scanQ-TOF tandem mass analyzerQuadrupole mass analyzerSelected reaction monitoringTOF/TOF tandem mass analyzerTandem mass analyzerTime-of-flight (TOF) mass analyzerTriple quadrupoles tandem mass analyzer

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Area of Science:

  • Analytical Chemistry
  • Molecular Biology

Background:

  • Mass spectrometers consist of ion sources, mass analyzers, and detectors.
  • The mass analyzer determines the mass-to-charge ratio (m/z) of ions, enabling mass determination.
  • Accurate mass measurement is vital in molecular biology for analyzing biomolecules.

Purpose of the Study:

  • To highlight the critical role of the mass analyzer in mass spectrometry.
  • To emphasize the importance of analyzer selection based on analyte characteristics and experimental goals.

Main Methods:

  • Discussion of mass spectrometer components and their functions.
  • Explanation of ion ionization and detection processes.
  • Focus on the mass analyzer's function in determining mass-to-charge ratio (m/z).

Main Results:

  • The mass analyzer is the primary component responsible for determining analyte mass.
  • Biomolecules in molecular biology often have low molecular weight or multiple charges (z) post-ionization.
  • The choice of mass analyzer is contingent upon the ionized analyte's properties and experimental requirements.

Conclusions:

  • The mass analyzer is key to a mass spectrometer's function of determining analyte mass.
  • Proper selection of a mass analyzer is essential for successful molecular biology applications.
  • Understanding analyte properties and experimental needs guides the choice of mass analyzer.