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Related Concept Videos

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

Gas Chromatography–Mass Spectrometry (GC–MS)

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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....
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Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow
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Filling the Gaps in PFAS Detection: Integrating GC-MS Non-Targeted Analysis for Comprehensive Environmental

Seth R Newton1, John A Bowden2, Nathaniel Charest1

  • 1Center for Computational Toxicology and Exposure, US Environmental Protection Agency, Research Triangle Park, North Carolina, 27709, USA.

Environmental Science & Technology Letters
|April 10, 2025
PubMed
Summary

Gas chromatography-mass spectrometry (GC-MS) offers a powerful, complementary approach to liquid chromatography-mass spectrometry (LC-MS) for non-targeted analysis (NTA) of per- and polyfluoroalkyl substances (PFAS). GC-NTA can uncover a wider range of PFAS, including novel and volatile compounds, crucial for environmental monitoring.

Keywords:
GC-NTAPFASgas chromatographynon-targeted analysissuspect screening

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Area of Science:

  • Environmental Chemistry
  • Analytical Chemistry
  • Mass Spectrometry

Background:

  • Per- and polyfluoroalkyl substances (PFAS) are environmental contaminants of growing concern.
  • Non-targeted analysis (NTA) is essential for identifying novel PFAS structures.
  • Current PFAS NTA predominantly uses liquid chromatography-mass spectrometry (LC-MS), potentially overlooking significant chemical space.

Purpose of the Study:

  • To highlight the underutilized potential of gas chromatography-mass spectrometry (GC-MS) in NTA for PFAS.
  • To demonstrate that GC-MS (GC-NTA) offers complementary coverage to LC-MS for PFAS analysis.
  • To advocate for increased adoption of GC-NTA in environmental and industrial research.

Main Methods:

  • Bibliometric analysis indicating LC-MS dominance in PFAS NTA.
  • Application of an LC-MS amenability model to a large PFAS dataset (~12,000 compounds).
  • Theoretical and practical considerations of GC-MS performance in NTA (GC-NTA).

Main Results:

  • Less than 10% of known PFAS chemistry is predicted to be amenable to typical LC-MS.
  • GC-MS covers a complementary chemical space, particularly for volatile and semi-volatile PFAS.
  • GC-NTA is crucial for discovering novel PFAS and transformation products in various environmental matrices and industrial waste streams.

Conclusions:

  • GC-NTA is a vital, yet underutilized, technique for comprehensive PFAS assessment.
  • GC-NTA can elucidate unknown PFAS and transformation products missed by LC-MS.
  • Increased recognition and implementation of GC-NTA are necessary to fully understand the PFAS contamination landscape.