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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Latest update: 08 Aug 2022
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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.