Interferences with aerosol acidity quantification due to gas-phase ammonia uptake onto acidic sulfate filter samples

Nault, Benjamin A.; Campuzano-Jost, Pedro; Day, Douglas A.; Guo, Hongyu; Jo, Duseong S.; Handschy, Anne V.; Pagonis, Demetrios; Schroder, Jason C.; Schueneman, Melinda K.; Cubison, Michael J.; Dibb, Jack E.; Hodzic, Alma; Hu, Weiwei; Palm, Brett B.; Jimenez, Jose L.

doi:https://doi.org/10.5194/amt-13-6193-2020

Articles | Volume 13, issue 11

https://doi.org/10.5194/amt-13-6193-2020

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

https://doi.org/10.5194/amt-13-6193-2020

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

Articles | Volume 13, issue 11

Research article

|

19 Nov 2020

Research article |

| 19 Nov 2020

Interferences with aerosol acidity quantification due to gas-phase ammonia uptake onto acidic sulfate filter samples

Benjamin A. Nault, Pedro Campuzano-Jost, Douglas A. Day, Hongyu Guo, Duseong S. Jo, Anne V. Handschy, Demetrios Pagonis, Jason C. Schroder, Melinda K. Schueneman, Michael J. Cubison, Jack E. Dibb, Alma Hodzic, Weiwei Hu, Brett B. Palm, and Jose L. Jimenez

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Final revised paper (published on 19 Nov 2020)
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Preprint (discussion started on 15 Jul 2020)
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Interactive discussion

Status: closed

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

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RC1: 'Some nuances regarding Nault et al's analysis of ammonia uptake onto acidic aerosol samples', Anonymous Referee #1, 11 Aug 2020
- AC1: 'Response to reviewers', Benjamin A Nault, 25 Sep 2020
RC2: 'Review of Nault et al.,', Anonymous Referee #2, 12 Aug 2020
- AC1: 'Response to reviewers', Benjamin A Nault, 25 Sep 2020

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Benjamin A Nault on behalf of the Authors (25 Sep 2020) Author's response Manuscript

ED: Publish as is (05 Oct 2020) by Pierre Herckes

AR by Benjamin A Nault on behalf of the Authors (05 Oct 2020) Manuscript

Short summary

Collecting particulate matter, or aerosols, onto filters to be analyzed offline is a widely used method to investigate the mass concentration and chemical composition of the aerosol, especially the inorganic portion. Here, we show that acidic aerosol (sulfuric acid) collected onto filters and then exposed to high ammonia mixing ratios (from human emissions) will lead to biases in the ammonium collected onto filters, and the uptake of ammonia is rapid (< 10 s), which impacts the filter data.