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Article

Molecular Speciation of Size Fractionated Particulate Water-Soluble Organic Carbon by Two-Dimensional Nuclear Magnetic Resonance (NMR) Spectroscopy

1
Fay W. Boozman College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
2
Biological Sciences Department, School of Arts and Science, New York City College of Technology, Brooklyn, NY 11201, USA
3
Department of Environmental, Occupational and Geospatial Health Sciences, Graduate School of Public Health and Health Policy, City University of New York, New York, NY 10027, USA
*
Author to whom correspondence should be addressed.
Academic Editors: Yu-Pin Lin and Marta Otero
Int. J. Environ. Res. Public Health 2021, 18(3), 1334; https://doi.org/10.3390/ijerph18031334
Received: 24 December 2020 / Revised: 20 January 2021 / Accepted: 27 January 2021 / Published: 2 February 2021
(This article belongs to the Special Issue Feature Papers in Environmental Science and Engineering)
Particulate matter is associated with increased morbidity and mortality; its effects depend on particle size and chemical content. It is important to understand the composition and resultant toxicological profile of particulate organic compounds, the largest and most complex fraction of particulate matter. The objective of the study was to delineate the nuclear magnetic resonance (NMR) spectral fingerprint of the biologically relevant water-soluble organic carbon (WSOC) fraction of size fractionated urban aerosol. A combination of one and two-dimensional NMR spectroscopy methods was used. The size distribution of particle mass, water-soluble extract, non-exchangeable organic hydrogen functional types and specific biomarkers such as levoglucosan, methane sulfonate, ammonium and saccharides indicated the contribution of fresh and aged wood burning emissions, anthropogenic and biogenic secondary aerosol for fine particles as well as primary traffic exhausts and pollen for large particles. Humic-like macromolecules in the fine particle size range included branched carbon structures containing aromatic, olefinic, keto and nitrile groups and terminal carboxylic and hydroxyl groups such as terpenoid-like polycarboxylic acids and polyols. Our study show that 2D-NMR spectroscopy can be applied to study the chemical composition of size fractionated aerosols. View Full-Text
Keywords: organic aerosol; nuclear magnetic resonance; aerosol sources; particle size; urban organic aerosol; nuclear magnetic resonance; aerosol sources; particle size; urban
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MDPI and ACS Style

Chalbot, M.-C.; Siddiqui, S.; Kavouras, I.G. Molecular Speciation of Size Fractionated Particulate Water-Soluble Organic Carbon by Two-Dimensional Nuclear Magnetic Resonance (NMR) Spectroscopy. Int. J. Environ. Res. Public Health 2021, 18, 1334. https://doi.org/10.3390/ijerph18031334

AMA Style

Chalbot M-C, Siddiqui S, Kavouras IG. Molecular Speciation of Size Fractionated Particulate Water-Soluble Organic Carbon by Two-Dimensional Nuclear Magnetic Resonance (NMR) Spectroscopy. International Journal of Environmental Research and Public Health. 2021; 18(3):1334. https://doi.org/10.3390/ijerph18031334

Chicago/Turabian Style

Chalbot, Marie-Cecile, Salma Siddiqui, and Ilias G. Kavouras. 2021. "Molecular Speciation of Size Fractionated Particulate Water-Soluble Organic Carbon by Two-Dimensional Nuclear Magnetic Resonance (NMR) Spectroscopy" International Journal of Environmental Research and Public Health 18, no. 3: 1334. https://doi.org/10.3390/ijerph18031334

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