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

Li, Guo; Su, Hang; Ma, Nan; Zheng, Guangjie; Kuhn, Uwe; Li, Meng; Klimach, Thomas; Pöschl, Ulrich; Cheng, Yafang

doi:https://doi.org/10.5194/amt-13-6053-2020

Articles | Volume 13, issue 11

https://doi.org/10.5194/amt-13-6053-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/amt-13-6053-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

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

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Final revised paper (published on 13 Nov 2020)
Supplement to the final revised paper
Preprint (discussion started on 16 Oct 2019)
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Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Comments', Anonymous Referee #1, 11 Nov 2019
- RC2: 'pH of aerosols using pH indicator paper', Anonymous Referee #2, 05 Feb 2020
  - AC2: 'Responses to Comments of Anonymous Referee # 2', Guo Li, 30 Aug 2020
- AC1: 'Responses to Comments of Anonymous Referee # 1', Guo Li, 30 Aug 2020
EC1: 'Review from the third referee', Mingjin Tang, 05 Mar 2020
- AC3: 'Responses to Comments of Anonymous Referee # 3', Guo Li, 30 Aug 2020

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.