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MALDI-TOF Mass Spectrometry01:19

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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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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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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.
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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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The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte...
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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 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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Mass Spectrometry Applications for Toxicology.

Michael M Mbughuni1, Paul J Jannetto1, Loralie J Langman1

  • 1Department of Laboratory Medicine, Mayo Clinic , Rochester, MN, USA.

EJIFCC
|February 3, 2017
PubMed
Summary

Mass spectrometry (MS) is a vital tool in toxicology, analyzing drugs and poisons. This review highlights hyphenated MS techniques like GC-MS and LC-MS for advanced toxicological analysis.

Keywords:
Environmental toxicologyclinical toxicologyforensic toxicologymass spectrometry technologies

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Area of Science:

  • Toxicology
  • Analytical Chemistry
  • Biochemistry

Background:

  • Toxicology investigates poisons, their effects, mechanisms, and treatments.
  • Mass spectrometry (MS) is a key analytical technique in toxicology.
  • MS is applied across environmental, clinical, and forensic toxicology.

Purpose of the Study:

  • To review hyphenated mass spectrometry (MS) technologies.
  • To discuss their applications in toxicological analysis.

Main Methods:

  • Review of scientific literature on hyphenated MS techniques.
  • Focus on Gas Chromatography-MS (GC-MS), Liquid Chromatography-MS (LC-MS), Inductively Coupled Plasma-MS (ICP-MS), and Tandem MS (MS/MS, MSn).

Main Results:

  • Hyphenated MS techniques are powerful tools in toxicology.
  • These methods enable detailed analysis of drugs, poisons, and metabolites.
  • Applications span diverse toxicological fields.

Conclusions:

  • Hyphenated MS technologies are indispensable in modern toxicology.
  • They provide critical insights into poison-related health effects.
  • Continued advancements in MS enhance toxicological research and practice.