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Related Concept Videos

Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

2.1K
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...
2.1K
Gas Chromatography–Mass Spectrometry (GC–MS)01:14

Gas Chromatography–Mass Spectrometry (GC–MS)

6.2K
Gas chromatography–mass spectrometry (GC–MS) is the combination of analytical techniques of gas chromatography and mass spectrometry in a single instrument for analyzing a mixture of compounds. The gas chromatograph separates the compounds in the mixture, and the mass spectrometer analyzes each compound separately to determine the molecular masses and molecular structures.
A gas chromatograph consists of a long, narrow capillary column with a polysiloxane coating on the inner wall....
6.2K
Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

3.0K
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...
3.0K
Mass Spectrometry: Overview01:19

Mass Spectrometry: Overview

8.3K
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...
8.3K
Mass Spectrometers01:16

Mass Spectrometers

9.6K
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:
9.6K
Mass Spectrum: Interpretation01:24

Mass Spectrum: Interpretation

4.1K
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 soft-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...
4.1K

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Related Experiment Video

Updated: May 5, 2026

Chromatographic Fingerprinting by Template Matching for Data Collected by Comprehensive Two-Dimensional Gas Chromatography
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Chromatographic Fingerprinting by Template Matching for Data Collected by Comprehensive Two-Dimensional Gas Chromatography

Published on: September 2, 2020

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Spectral deconvolution for overlapping GC/MS components.

B N Colby1

  • 1Paciftc Analytical, Inc., 6349 Paseo Del Lago, 92009, Carlsbad, CA.

Journal of the American Society for Mass Spectrometry
|November 16, 2013
PubMed
Summary

Mass chromatogram peak centroids precisely identify overlapping gas chromatography/mass spectrometry components. This method successfully deconvoluted spectra for multiple components, matching NIST database spectra.

Area of Science:

  • Analytical Chemistry
  • Spectroscopy

Background:

  • Gas chromatography/mass spectrometry (GC/MS) is crucial for chemical analysis.
  • Overlapping peaks in GC/MS data complicate component identification.
  • Accurate deconvolution of complex spectra is essential for reliable analysis.

Purpose of the Study:

  • To investigate the utility of mass chromatogram peak centroids for deconvoluting overlapping GC/MS spectra.
  • To assess the precision required for effective spectral deconvolution.

Main Methods:

  • Calculating mass chromatogram peak centroids with high precision.
  • Applying centroid data to deconvolute spectra of co-eluting GC/MS components.
  • Comparing deconvoluted spectra against the National Institute of Standards and Technology (NIST) database.

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Facile Preparation of 4-Substituted Quinazoline Derivatives
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Facile Preparation of 4-Substituted Quinazoline Derivatives

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Large Scale Non-targeted Metabolomic Profiling of Serum by Ultra Performance Liquid Chromatography-Mass Spectrometry UPLC-MS
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Large Scale Non-targeted Metabolomic Profiling of Serum by Ultra Performance Liquid Chromatography-Mass Spectrometry UPLC-MS

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Related Experiment Videos

Last Updated: May 5, 2026

Chromatographic Fingerprinting by Template Matching for Data Collected by Comprehensive Two-Dimensional Gas Chromatography
10:14

Chromatographic Fingerprinting by Template Matching for Data Collected by Comprehensive Two-Dimensional Gas Chromatography

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Facile Preparation of 4-Substituted Quinazoline Derivatives
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Facile Preparation of 4-Substituted Quinazoline Derivatives

Published on: February 15, 2016

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Large Scale Non-targeted Metabolomic Profiling of Serum by Ultra Performance Liquid Chromatography-Mass Spectrometry UPLC-MS
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Large Scale Non-targeted Metabolomic Profiling of Serum by Ultra Performance Liquid Chromatography-Mass Spectrometry UPLC-MS

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Main Results:

  • Peak centroids were calculated with a standard deviation of 0.04 scans.
  • Successful deconvolution of two components eluting 0.48 scans apart.
  • Deconvolution of six components within a 9 scan window was achieved.
  • Generated spectra showed excellent agreement with NIST database spectra.

Conclusions:

  • Mass chromatogram peak centroid analysis is a viable method for GC/MS spectral deconvolution.
  • High precision in centroid calculation enables the resolution of closely eluting components.
  • This technique enhances the accuracy of chemical component identification in complex mixtures.