Articles | Volume 13, issue 11
Atmos. Meas. Tech., 13, 6053–6065, 2020
https://doi.org/10.5194/amt-13-6053-2020
Atmos. Meas. Tech., 13, 6053–6065, 2020
https://doi.org/10.5194/amt-13-6053-2020

Research article 13 Nov 2020

Research article | 13 Nov 2020

Multifactor colorimetric analysis on pH-indicator papers: an optimized approach for direct determination of ambient aerosol pH

Guo Li et al.

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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Svenja Lange on behalf of the Authors (16 Sep 2020)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (17 Sep 2020) by Mingjin Tang
RR by Anonymous Referee #1 (17 Sep 2020)
RR by Rodney Weber (03 Oct 2020)
ED: Publish as is (04 Oct 2020) by Mingjin Tang
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Short summary
Aerosol acidity plays an important role in regulating the chemistry, health, and ecological effect of aerosol particles. However, a direct measurement of aerosol pH is very challenging because of its fast transition and equilibrium with adjacent environments. Therefore, most early studies have to use modeled pH, resulting in intensive debates about model uncertainties. Here we developed an optimized approach to measure aerosol pH by using pH-indicator papers combined with RGB-based colorimetry.