Articles | Volume 18, issue 11
https://doi.org/10.5194/amt-18-2509-2025
https://doi.org/10.5194/amt-18-2509-2025
Research article
 | 
12 Jun 2025
Research article |  | 12 Jun 2025

A comprehensive characterization of empirical parameterizations for OH exposure in the Aerodyne Potential Aerosol Mass Oxidation Flow Reactor (PAM-OFR)

Qianying Liu, Dan Dan Huang, Andrew T. Lambe, Shengrong Lou, Lulu Zeng, Yuhang Wu, Congyan Huang, Shikang Tao, Xi Cheng, Qi Chen, Ka In Hoi, Hongli Wang, Kai Meng Mok, Cheng Huang, and Yong Jie Li

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Cited articles

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Short summary
We evaluate the applicability of empirical equations to estimate OH exposure (OHexp) in an oxidative flow reactor (OFR). The fitting parameters obtained within a narrow range of conditions can generally be extended to estimate the OHexp for wide ranges of conditions in the OFR, except for external OH reactivity, which requires new fitting. At least 20–30 data points from SO2 or CO decay with varying conditions are required to fit a set of empirical parameters that can accurately estimate OHexp.
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