Organic Acid Aerosol Measurements from the Mount Airy Site for CoURAGE

Smith, Rayal; Asa-Awuku, Akua

doi:10.5439/3008637

Title: Organic Acid Aerosol Measurements from the Mount Airy Site for CoURAGE

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Abstract

This study investigates the prevalence and distribution of organic acid aerosols in a rural environment using filter-based measurements collected in Mount Airy, Maryland, during the CoURAGE campaign from March 19th through June 12th 2025. PM2.5 filters quantify a range of organic acids commonly associated with secondary organic aerosol formation and atmospheric oxidation processes. Each filter was collected using a 15 LPM sampler and was extracted in ultrapure Millipore water (>18 MΩ), allowing water-soluble organic acids to be extracted into solution for analysis. The extracts were then examined using a Waters Acquity I-Class PLUS liquid chromatography system coupled to a Bruker Maxis-II ultra-high-resolution Q-TOF mass spectrometer with electrospray ionization, providing high-sensitivity detection and separation of target compounds. Concentrations of several key organic acids were quantified, including acetic, propionic, pyruvic, butyric, oxalic, isovaleric, valeric, malonic, maleic, succinic, glutaric, malic, adipic, and citric acids. These findings contribute to ongoing efforts to understand regional aerosol composition and their impacts on aerosol-cloud interactions.

Authors:

;

Publication Date:: Wed Dec 17 04:00:00 UTC 2025

DOE Contract Number:: AC05-00OR22725

Research Org.:: Atmospheric Radiation Measurement User Facility

Sponsoring Org.:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

Collaborations:: PNNL, BNL, ANL, ORNL

Subject:: Acetic acid; Adipic Acid; Butyric Acid; Citric Acid; Glutaric Acid; Isovaleric Acid; Liquid Chromatography Mass Spectrometry with PM2.5 filters; Maleic Acid; Malic Acid; Malonic Acid; Organic Acids; Organic mass concentration; Oxalic Acid; Propionic Acid; Pyruvic Acid; Stratosphere; Succinic acid; Troposphere; Valeric Acid

OSTI Identifier:: 3008637

DOI:: https://doi.org/10.5439/3008637

Citation Formats


                    Smith, Rayal, and Asa-Awuku, Akua. Organic Acid Aerosol Measurements from the Mount Airy Site for CoURAGE.  United States: N. p., 2025. 
        Web.  doi:10.5439/3008637.

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                    Smith, Rayal, & Asa-Awuku, Akua. Organic Acid Aerosol Measurements from the Mount Airy Site for CoURAGE.  United States.  doi:https://doi.org/10.5439/3008637

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                    Smith, Rayal, and Asa-Awuku, Akua. 2025.  
"Organic Acid Aerosol Measurements from the Mount Airy Site for CoURAGE".  United States.  doi:https://doi.org/10.5439/3008637.  https://www.osti.gov/servlets/purl/3008637. Pub date:Wed Dec 17 04:00:00 UTC 2025

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@article{osti_3008637,

  title        = {Organic Acid Aerosol Measurements from the Mount Airy Site for CoURAGE},

  author       = {Smith, Rayal and Asa-Awuku, Akua},

  abstractNote = {This study investigates the prevalence and distribution of organic acid aerosols in a rural environment using filter-based measurements collected in Mount Airy, Maryland, during the CoURAGE campaign from March 19th through June 12th 2025. PM2.5 filters quantify a range of organic acids commonly associated with secondary organic aerosol formation and atmospheric oxidation processes. Each filter was collected using a 15 LPM sampler and was extracted in ultrapure Millipore water (>18 MΩ), allowing water-soluble organic acids to be extracted into solution for analysis. The extracts were then examined using a Waters Acquity I-Class PLUS liquid chromatography system coupled to a Bruker Maxis-II ultra-high-resolution Q-TOF mass spectrometer with electrospray ionization, providing high-sensitivity detection and separation of target compounds. Concentrations of several key organic acids were quantified, including acetic, propionic, pyruvic, butyric, oxalic, isovaleric, valeric, malonic, maleic, succinic, glutaric, malic, adipic, and citric acids. These findings contribute to ongoing efforts to understand regional aerosol composition and their impacts on aerosol-cloud interactions.},

  doi          = {10.5439/3008637},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Wed Dec 17 04:00:00 UTC 2025},

  month        = {Wed Dec 17 04:00:00 UTC 2025}

}

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DOI: https://doi.org/10.5439/3008637

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