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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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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 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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Quantitative Analysis01:12

Quantitative Analysis

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Quantitative analysis is a technique for measuring the amount of specific constituents in a sample. When the sample's composition is unknown, qualitative analysis is performed first to identify its components, which ensures that the correct substances are measured during the quantitative phase.
In quantitative analysis, two key measurements are made: the sample quantity and a property proportional to the amount of the analyte (the substance being analyzed). This forms the basis of the...
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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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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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Updated: Mar 7, 2026

Lipid Droplet Isolation for Quantitative Mass Spectrometry Analysis
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Lipid Droplet Isolation for Quantitative Mass Spectrometry Analysis

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Sterol Analysis by Quantitative Mass Spectrometry.

Andrew M Jenner1,2, Simon H J Brown3

  • 1Bioanalytical Mass Spectrometry Facility, Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW, Australia. ajenner@uow.edu.au.

Methods in Molecular Biology (Clifton, N.J.)
|February 17, 2017
PubMed
Summary

Mass spectrometry is a key technique for analyzing sterols, enabling both identification and measurement of sterol lipid species. This method involves lipid extraction, preparation for ionization, and chromatographic separation for precise characterization.

Keywords:
ElectrosprayGC-MSLC-MSSterolTandem mass-spectrometry

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Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Lipidomics

Background:

  • Sterols are vital lipids with diverse biological roles.
  • Accurate analysis of sterol molecular species is crucial for understanding biological processes.
  • Existing analytical methods require refinement for comprehensive sterol profiling.

Purpose of the Study:

  • To outline a mass spectrometry-based approach for sterol analysis.
  • To detail methods for qualitative and quantitative characterization of sterol lipid species.
  • To highlight the utility of tandem mass spectrometry in sterol identification.

Main Methods:

  • Lipid isolation via homogenization and solvent extraction from biological matrices.
  • Preparation of sterols for mass spectrometry through derivatization or adduct formation.
  • Chromatographic separation (GC or LC) coupled with tandem mass spectrometry (MS/MS) for identification and quantification using internal standards.

Main Results:

  • Mass spectrometry provides robust qualitative and quantitative data on sterol molecular species.
  • Tandem mass spectrometry enables precise identification of individual sterol lipids.
  • The integration of chromatography and mass spectrometry enhances sterol resolution and characterization.

Conclusions:

  • Mass spectrometry is a fundamental and powerful technique for comprehensive sterol analysis.
  • The described methodology allows for accurate identification and quantification of sterol lipid species.
  • This approach is essential for advancing research in lipidomics and related biological fields.