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Schneider E, Neumann A, Chacón-Patiño ML, Somero M, Ruppel MM, Ihalainen M, Köster K, Sippula O, Czech H, Rüger CP, Zimmermann R. Accessing the Low-Polar Molecular Composition of Boreal and Arctic Peat-Burning Organic Aerosol via Thermal Analysis and Ultrahigh-Resolution Mass Spectrometry: Structural Motifs and Their Formation. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2024. [PMID: 38950165 DOI: 10.1021/jasms.4c00120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/03/2024]
Abstract
Peatland fires emit organic carbon-rich particulate matter into the atmosphere. Boreal and Arctic peatlands are becoming more vulnerable to wildfires, resulting in a need for better understanding of the emissions of these special fires. Extractable, nonpolar, and low-polar organic aerosol species emitted from laboratory-based boreal and Arctic peat-burning experiments are analyzed by direct-infusion atmospheric pressure photoionization (APPI) ultrahigh-resolution mass spectrometry (UHRMS) and compared to time-resolved APPI UHRMS evolved gas analysis from the thermal analysis of peat under inert nitrogen (pyrolysis) and oxidative atmosphere. The chemical composition is characterized on a molecular level, revealing abundant aromatic compounds that partially contain oxygen, nitrogen, or sulfur and are formed at characteristic temperatures. Two main structural motifs are identified, single core and multicore, and their temperature-dependent formation is assigned to the thermal degradation of the lignocellulose building blocks and other parts of peat.
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Affiliation(s)
- Eric Schneider
- Joint Mass Spectrometry Centre, Department of Analytical and Technical Chemistry, University of Rostock, 18059 Rostock, Germany
- Department Life, Light & Matter (LL&M), University of Rostock, 18059 Rostock, Germany
| | - Anika Neumann
- Joint Mass Spectrometry Centre, Department of Analytical and Technical Chemistry, University of Rostock, 18059 Rostock, Germany
- Department Life, Light & Matter (LL&M), University of Rostock, 18059 Rostock, Germany
| | - Martha L Chacón-Patiño
- National High Magnetic Field Laboratory, Florida State University, 32310 Tallahassee, United States
| | - Markus Somero
- Department of Environmental and Biological Sciences, University of Eastern Finland, 70210 Kuopio, Finland
| | - Meri M Ruppel
- Atmospheric Composition Unit, Finnish Meteorological Institute, 00014 Helsinki, Finland
| | - Mika Ihalainen
- Department of Environmental and Biological Sciences, University of Eastern Finland, 70210 Kuopio, Finland
| | - Kajar Köster
- Department of Environmental and Biological Sciences, University of Eastern Finland, 70210 Kuopio, Finland
| | - Olli Sippula
- Department of Environmental and Biological Sciences, University of Eastern Finland, 70210 Kuopio, Finland
- Department of Chemistry, University of Eastern Finland, 80101 Joensuu, Finland
| | - Hendryk Czech
- Joint Mass Spectrometry Centre, Department of Analytical and Technical Chemistry, University of Rostock, 18059 Rostock, Germany
- Joint Mass Spectrometry Centre, Cooperation Group "Comprehensive Molecular Analytics" (CMA), Helmholtz Centre Munich, 85764 Neuherberg, Germany
| | - Christopher P Rüger
- Joint Mass Spectrometry Centre, Department of Analytical and Technical Chemistry, University of Rostock, 18059 Rostock, Germany
- Department Life, Light & Matter (LL&M), University of Rostock, 18059 Rostock, Germany
| | - Ralf Zimmermann
- Joint Mass Spectrometry Centre, Department of Analytical and Technical Chemistry, University of Rostock, 18059 Rostock, Germany
- Department Life, Light & Matter (LL&M), University of Rostock, 18059 Rostock, Germany
- Joint Mass Spectrometry Centre, Cooperation Group "Comprehensive Molecular Analytics" (CMA), Helmholtz Centre Munich, 85764 Neuherberg, Germany
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