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Related Concept Videos

Other Nuclides: 31P, 19F, 15N NMR01:16

Other Nuclides: 31P, 19F, 15N NMR

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Many organic, inorganic, and biological molecules contain spin-half nuclei such as nitrogen-15, fluorine-19, and phosphorus-31. As a result, NMR studies of these nuclei have found extensive applications in chemical and biological research.
While fluorine-19 and phosphorous-31 have high natural abundances (100%) and positive gyromagnetic ratios, nitrogen-15 has a low natural abundance and a negative gyromagnetic ratio. However, nitrogen-15 is still preferred over nitrogen-14 (which has a...
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Related Experiment Video

Updated: Apr 14, 2026

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow
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PFAS quantification using solid phase extraction and low field Nuclear Magnetic Resonance (SPE-NMR).

Nicholas N A Ling1, Sahar Ghasemi1, Ella R Shilliday1

  • 1Department of Chemical Engineering, The University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|April 12, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a new method using solid phase extraction coupled with Nuclear Magnetic Resonance (SPE-NMR) spectroscopy to detect per- and polyfluoroalkyl substances (PFAS) in water. This technique offers a portable and fluorine-selective approach for quantifying these persistent organic pollutants.

Keywords:
Low field NMRPFASSolid phase extraction

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Area of Science:

  • Environmental Chemistry
  • Analytical Chemistry

Background:

  • Per- and polyfluoroalkyl substances (PFAS) are persistent organic pollutants found in global drinking water.
  • Their bioaccumulation and adverse health effects necessitate strict regulations on water concentrations.
  • Conventional analytical methods for PFAS face limitations in accuracy and accessibility.

Purpose of the Study:

  • To demonstrate a proof-of-concept for a novel SPE-NMR method for PFAS quantification in water.
  • To establish a robust, portable, and fluorine-selective approach for detecting perfluorooctanoic acid (PFOA).

Main Methods:

  • Solid phase extraction (SPE) was coupled with benchtop 19F Nuclear Magnetic Resonance (NMR) spectroscopy.
  • This combined SPE-NMR technique was applied for the quantification of PFOA in water samples.
  • Utilized quantitative low-field benchtop 19F NMR within an SPE-NMR workflow for the first time.

Main Results:

  • Successfully quantified perfluorooctanoic acid (PFOA) in water at ppm-level concentrations using SPE-NMR.
  • Demonstrated the feasibility of using benchtop 19F NMR in an SPE-NMR workflow for PFAS analysis.
  • The SPE-NMR method proved to be robust, portable, and fluorine-selective.

Conclusions:

  • SPE-NMR is a viable technique for the quantification of PFAS in water.
  • This method offers a promising alternative to traditional analytical techniques.
  • Future work can focus on process optimization to enhance sensitivity for broader PFAS detection.