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Updated: Jun 26, 2025

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow
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個々の溶液相分子のラベルフリー検出とプロファイリング

Lisa-Maria Needham1,2,3, Carlos Saavedra1, Julia K Rasch1

  • 1Department of Chemistry, University of Wisconsin-Madison, Madison, WI, USA.

Nature
|May 8, 2024
PubMed
まとめ

研究者達は新しい 単一分子の検出方法を開発しました このテクニックでは,微小穴を使って,溶液中のバイオ分子構造と動態を高感度で分析します.

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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.
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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.
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