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Related Concept Videos

Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

1.2K
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: Molecular Fragmentation Overview01:20

Mass Spectrometry: Molecular Fragmentation Overview

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The ionization of a molecule into a molecular ion inside the mass spectrometer causes instability in the molecule's structure due to the loss of an electron. This eventually leads to the fragmentation or breaking of some bonds in the molecule. The fragmentation occurs predominantly at specific bonds to yield relatively stable fragments.
One type of fragmentation pattern is the cleavage of a single bond in the molecular ion. The cleavage leads to a radical and a cation. The cleavage can occur at...
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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 electrospray 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...
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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...
6.0K
Mass Spectrum: Interpretation01:24

Mass Spectrum: Interpretation

2.0K
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 low-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...
2.0K
High-Resolution Mass Spectrometry (HRMS)01:15

High-Resolution Mass Spectrometry (HRMS)

2.0K
The resolution of a mass spectrometer depends on the efficiency of separating ions with different ion masses. The mass of an atom is approximated to the sum of the masses of protons and neutrons inside, considering the masses of protons and neutrons as equal. However, the masses of the proton (1.6726 × 10−24 g) and neutron (1.6749 × 10−24 g) are not truly equal. There is a minor error in the expression of atomic masses relative to the simplest atom of hydrogen. For...
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Related Experiment Video

Updated: Nov 8, 2025

Chemical Analysis of Water-accommodated Fractions of Crude Oil Spills Using TIMS-FT-ICR MS
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PyKrev: A Python Library for the Analysis of Complex Mixture FT-MS Data.

Ezra Kitson1, Will Kew2, Wen Ding1

  • 1EaSTCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3JF, United Kingdom.

Journal of the American Society for Mass Spectrometry
|April 27, 2021
PubMed
Summary
This summary is machine-generated.

PyKrev is a new Python library designed for analyzing complex mixture Fourier transform mass spectrometry (FT-MS) data. It offers tools for formula manipulation, chemical property calculation, and advanced visualizations, streamlining FT-MS data analysis.

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Area of Science:

  • Analytical Chemistry
  • Computational Chemistry
  • Bioinformatics

Background:

  • Fourier transform mass spectrometry (FT-MS) generates complex datasets requiring specialized analysis tools.
  • Existing software solutions for FT-MS data analysis are often fragmented or lack modern computational approaches.
  • Researchers need integrated tools for formula manipulation, property calculation, and visualization.

Purpose of the Study:

  • To introduce PyKrev, a Python library for comprehensive FT-MS data analysis.
  • To provide a cohesive suite of tools for post-formula assignment analysis.
  • To facilitate advanced data interpretation and visualization in FT-MS studies.

Main Methods:

  • Development of a Python library, PyKrev, offering a suite of analytical and visualization tools.
  • Implementation of functions for formula manipulation, chemical property calculation, and diversity analysis.
  • Integration of multivariate analysis techniques and various plotting functionalities (van Krevelen diagrams, PCA, UpSet plots).

Main Results:

  • PyKrev successfully analyzes complex FT-MS data, including formula manipulation and property calculations.
  • The library enables intersection analysis, chemical diversity assessment, and compound class assignment.
  • Visualization tools like van Krevelen diagrams and PCA plots are effectively generated for FT-MS datasets.

Conclusions:

  • PyKrev provides a unified and powerful platform for FT-MS data analysis in Python.
  • The library addresses the need for integrated tools incorporating recent data analysis techniques.
  • PyKrev enhances the capabilities of researchers working with complex mixture FT-MS data.