ArticleRapid communications in mass spectrometry : RCM2015
An ultrahigh-resolution mass spectrometry index to estimate natural organic matter lability.
Article in Rapid communications in mass spectrometry : RCM, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers.
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50 citing papers in PubMed, 470 citations in OpenAlex.
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- Molecular Characterization of Humic and Fulvic Acids of Waterlogged and Well-Drained Amazonian Podzols.ACS environmental Au · 2025Article
- Logging disrupts the ecology of molecules in headwater streams.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
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- Fate and carbon sequestration potential of sunken macroalgae in coastal oceans from long-term microbial degradation perspective.National science review · 2025Article
- Molecular diversity of dissolved organic matter reflects macroecological patterns in river networks.Scientific reports · 2025Article
- Article
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- Dynamics of organic matter in algal blooms on the Greenland ice sheet.Scientific reports · 2025Article
- Microplastics Generate Less Mineral Protection of Soil Carbon and More COAdvanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Article
Corrections and comments
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
rationaleDetermining the chemical constituents of natural organic matter (NOM) by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FTICRMS) remains the ultimate measure for probing its source material, evolution, and transport; however, lability and the fate of organic matter (OM) in the environment remain controversial. FTICRMS-derived elemental compositions are presented in this study to validate a new interpretative method to determine the extent of NOM lability from various environments.
methodsFTICRMS data collected over the last decade from the same 9.4 tesla instrument using negative electrospray ionization at the National High Magnetic Field Laboratory in Tallahassee, Florida, was used to validate the application of a NOM lability index. Solid-phase extraction cartridges were used to isolate the NOM prior to FTICRMS; mass spectral peaks were calibrated internally by commonly identified NOM homologous series, and molecular formulae were determined for NOM composition and lability analysis.
resultsA molecular lability boundary (MLB) was developed from the FTICRMS molecular data, visualized from van Krevelen diagrams, dividing the data into more and less labile constituents. NOM constituents above the MLB at H/C ≥1.5 correspond to more labile material, whereas NOM constituents below the MLB, H/C <1.5, exhibit less labile, more recalcitrant character. Of all marine, freshwater, and glacial environments considered for this study, glacial ecosystems were calculated to contain the most labile OM.
conclusionsThe MLB extends our interpretation of FTICRMS NOM molecular data to include a metric of lability, and generally ranked the OM environments from most to least labile as glacial > marine > freshwater. Applying the MLB is useful not only for individual NOM FTICRMS studies, but also provides a lability threshold to compare and contrast molecular data with other FTICRMS instruments that survey NOM from around the world.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.