Articles | Volume 14, issue 7
https://doi.org/10.5194/amt-14-4805-2021
https://doi.org/10.5194/amt-14-4805-2021
Research article
 | 
08 Jul 2021
Research article |  | 08 Jul 2021

Estimating mean molecular weight, carbon number, and OM∕OC with mid-infrared spectroscopy in organic particulate matter samples from a monitoring network

Amir Yazdani, Ann M. Dillner, and Satoshi Takahama

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Short summary
We propose a spectroscopic method for estimating several mixture-averaged molecular properties (carbon number and molecular weight) in particulate matter relevant for understanding its chemical origins. This estimation is enabled by calibration models built and tested using laboratory standards containing molecules with known structure, and can be applied to filter samples of PM2.5 currently collected in existing air pollution monitoring networks and field campaigns.