Articles | Volume 13, issue 11
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, Hang Su, Nan Ma, Guangjie Zheng, Uwe Kuhn, Meng Li, Thomas Klimach, Ulrich Pöschl, and Yafang Cheng


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Guo Li on behalf of the Authors (30 Aug 2020)
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
AR by Guo Li on behalf of the Authors (04 Oct 2020)  Manuscript 
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.