Related Experiment Video

Updated: Sep 5, 2026

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow
09:04

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Published on: April 18, 2019

Analysis of polychlorinated dibenzo-p-dioxins and dibenzofurans in chlorinated phenols by mass fragmentography

H R Buser

    Journal of Chromatography
    |April 16, 1975
    PubMed

    More Related Videos

    Analysis of Organochlorine Pesticides in a Soil Sample by a Modified QuEChERS Approach Using Ammonium Formate04:17

    Analysis of Organochlorine Pesticides in a Soil Sample by a Modified QuEChERS Approach Using Ammonium Formate

    Published on: January 20, 2023

    Elucidating the Metabolism of 2,4-Dibromophenol in Plants06:54

    Elucidating the Metabolism of 2,4-Dibromophenol in Plants

    Published on: February 10, 2023

    Related Concept Videos

    Chemical Ionization (CI) Mass Spectrometry01:21

    Chemical Ionization (CI) Mass Spectrometry

    The molecular ion peak of a molecule in the mass spectrum provides vital information for molecular identification. However, conventional electron impact ionization can lead to the rapid dissociation of some molecular ions before they reach the detector. A milder ionization method is required to increase the lifetime of such ionized analyte molecules. Chemical ionization (CI) is a gas-phase protonation reaction useful for mass-analyzing analyte molecules that are easily protonated to yield the...
    Mass Spectrometry: Cycloalkene Fragmentation00:54

    Mass Spectrometry: Cycloalkene Fragmentation

    The molecular ions of cycloalkenes undergo fragmentation via a retro-Diels–Alder reaction.
    Mass Spectrometry: Aromatic Compound Fragmentation01:23

    Mass Spectrometry: Aromatic Compound Fragmentation

    Upon ionization, aromatic compounds generate a molecular ion that is observed as a prominent peak in their mass spectra. For example, the molecular ion peak for benzene appears at a mass-to-charge ratio of 78, while toluene is observed at a mass-to-charge ratio of 92. The molecular ion benzene is highly stable and does not readily undergo further fragmentation due to the significant amount of energy required to disrupt the aromatic stability of the benzene ring. In contrast, the molecular ion...
    Mass Spectrometry: Alkyl Halide Fragmentation01:22

    Mass Spectrometry: Alkyl Halide Fragmentation

    Chlorine isotopes exist as 35Cl and 37Cl in a 3:1 ratio, while bromine isotopes exist as 79Br and 81Br in a 1:1 ratio. The mass spectrum of alkyl halides typically produces two distinct molecular ion peaks, the molecular ion peak, [M], and the molecular ion plus two, [M + 2] peak. The relative heights of these two peaks are proportional to the isotopic abundance ratios of the halide. For example, 2‐chloropropane and 1‐bromopropane display two peaks with relative peak heights in a 3:1 and 1:1...
    Mass Spectrometry: Complex Analysis01:21

    Mass Spectrometry: Complex Analysis

    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...
    Gas Chromatography: Types of Detectors-II01:19

    Gas Chromatography: Types of Detectors-II

    In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...