Organic Acid Aerosol Measurements from the Mount Airy Site for CoURAGE
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.
- Research Organization:
- Atmospheric Radiation Measurement User Facility
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Contributing Organization:
- PNNL, BNL, ANL, ORNL
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 3008637
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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